




Give it a bath in some luke warm water before jumping to any conclusions. The years of dirt and ink tend to make some of the lighter colors become changelings.
Jeremy
Thanks Jeremy!
I'll try that out, and report back.
-Ari 
Those are the color shade varieties that I was referring to.
The 2010 Scott Specialized only lists Scott 510a as unused - has that changed?
I don't think it has. My 2019 copy of the U.S. Specialized says the same thing.
Jeremy
@Everyone
Scott Cat. only gives a price for mint 510a, but if you continue reading it says "Earliest documented use 27 March 1917", just because there's no price given does not mean used copies do not exist!
Hi everyone!
Yes, some copies were used I looked that up, just not really registered.
Here is a photo of the same stamp in question.
It was soaked and sat overnight.
Well Sarge, I think you may be right here.
It has become more of a deep golden brown, rather than yellow brown.
Lead oxidation, I would presume caused this.
What is everyone else's opinion?
Thanks!
-Ari 

Ari,
The discussion of identifying colors by shade is one of the hottest topics that comes up in philately and often times gets ugly with those that cannot understand that there is more than one source of information or they are seemingly not flexible or capable of accepting any other opinion than their own. Every single one of us in the world sees colors differently. Don't get discouraged with the quest for those tuff to find stamps.
Without a Munsell Book of Colors or R.H. White's color guide and the stamp in front of you. There is absolutely no way to know for sure what you have. So far you have done an excellent job of identifying what you have with what you have. Keep it up.
The references that I just mentioned are what the professionals use. The only place that I have ever seen or touched either one was at the Rocky Mountain Philatelic Library. It was several years back when I was entertaining the idea of acquiring both. But life and the lack of the serious coin got in the way.
Jeremy
Jeremy,
Thank you so much for the encouragement.
Stamp colors have been quite hard for me to ID until I got a color gauge!
Even with it, I am very aware that all eyes see color different.
As well as the fact that all computer screens display color differently.
My computer displays differently, than my monitor as such.
I've always wanted to go to the Rocky Mountain Philatelic Library.
Would also then want to head over to the ANA Coin Club, which I am also a member of.
-Ari 
I have often soaked stamps in a small bowl of warm water with a couple drops of dishwashing detergent. I’ve even saved a couple of very dirty stamps by adding a drop or two of ordinary bleach to the water and detergent, and rubbing the back and front of the wet stamps VERY gently. The stamps seem to have survived as long as I have, and in better condition.
Bob
I use the same method of adding a drop or two of Dawn to the solution and then use acid brushes to do any scrubbing. Very gently is the name of the game and so is slow and steady wins the race. Meaning it isn't a race at all. Let the solution do the work for you. Wash rinse repeat as necessary.
Jeremy
Trying to gauge colors on a monitor can be very dicey. Differences in scanners/cameras, lighting, displays (LED vs. CRT vs. plasma), resolution, and the applications used to interpret everything can introduce a lot of uncertainty. Having said that, you can get a rough idea of correct color by checking out certificates of authenticity from the "big 3" expertizing services. Here's a link to a genuine 510a that was certified by PSE: http://psestamp.com/Cert/1258507.* To date they have certified three 510a's, one used. The PF has also certified three genuine unused copies. But to my point above, looking at the genuine copies online, you will see noticeable differences in color shade.
* You will need to use the StampSmarter app to view PSE certs by catalog number: https://stampsmarter.org/Learning/PSEView.html
Regards,
Steve
Thanks Steve!
Seeing that, mine is not one.
Appreciate the advice!
-Ari 

Hi everyone!
I was looking through a lot of stamps sent to me and I came across 4 copies of 510.
I checked them with my eyes, and Wonder Color Gauge as well.
The middle-right stamp seems to me to be brown yellow, which if so is a $2K Stamp!
I put it under my Gauge under yellow tint, and it came up on the darker side.
Below is an image to help.
Thanks!
-Ari 

re: #510a Or Brown Yellow?
Give it a bath in some luke warm water before jumping to any conclusions. The years of dirt and ink tend to make some of the lighter colors become changelings.
Jeremy

re: #510a Or Brown Yellow?
Thanks Jeremy!
I'll try that out, and report back.
-Ari 
re: #510a Or Brown Yellow?
Those are the color shade varieties that I was referring to.
re: #510a Or Brown Yellow?
The 2010 Scott Specialized only lists Scott 510a as unused - has that changed?
re: #510a Or Brown Yellow?
I don't think it has. My 2019 copy of the U.S. Specialized says the same thing.
Jeremy

re: #510a Or Brown Yellow?
@Everyone
Scott Cat. only gives a price for mint 510a, but if you continue reading it says "Earliest documented use 27 March 1917", just because there's no price given does not mean used copies do not exist!

re: #510a Or Brown Yellow?
Hi everyone!
Yes, some copies were used I looked that up, just not really registered.
Here is a photo of the same stamp in question.
It was soaked and sat overnight.
Well Sarge, I think you may be right here.
It has become more of a deep golden brown, rather than yellow brown.
Lead oxidation, I would presume caused this.
What is everyone else's opinion?
Thanks!
-Ari 

re: #510a Or Brown Yellow?
Ari,
The discussion of identifying colors by shade is one of the hottest topics that comes up in philately and often times gets ugly with those that cannot understand that there is more than one source of information or they are seemingly not flexible or capable of accepting any other opinion than their own. Every single one of us in the world sees colors differently. Don't get discouraged with the quest for those tuff to find stamps.
Without a Munsell Book of Colors or R.H. White's color guide and the stamp in front of you. There is absolutely no way to know for sure what you have. So far you have done an excellent job of identifying what you have with what you have. Keep it up.
The references that I just mentioned are what the professionals use. The only place that I have ever seen or touched either one was at the Rocky Mountain Philatelic Library. It was several years back when I was entertaining the idea of acquiring both. But life and the lack of the serious coin got in the way.
Jeremy

re: #510a Or Brown Yellow?
Jeremy,
Thank you so much for the encouragement.
Stamp colors have been quite hard for me to ID until I got a color gauge!
Even with it, I am very aware that all eyes see color different.
As well as the fact that all computer screens display color differently.
My computer displays differently, than my monitor as such.
I've always wanted to go to the Rocky Mountain Philatelic Library.
Would also then want to head over to the ANA Coin Club, which I am also a member of.
-Ari 

re: #510a Or Brown Yellow?
I have often soaked stamps in a small bowl of warm water with a couple drops of dishwashing detergent. I’ve even saved a couple of very dirty stamps by adding a drop or two of ordinary bleach to the water and detergent, and rubbing the back and front of the wet stamps VERY gently. The stamps seem to have survived as long as I have, and in better condition.
Bob
re: #510a Or Brown Yellow?
I use the same method of adding a drop or two of Dawn to the solution and then use acid brushes to do any scrubbing. Very gently is the name of the game and so is slow and steady wins the race. Meaning it isn't a race at all. Let the solution do the work for you. Wash rinse repeat as necessary.
Jeremy
re: #510a Or Brown Yellow?
Trying to gauge colors on a monitor can be very dicey. Differences in scanners/cameras, lighting, displays (LED vs. CRT vs. plasma), resolution, and the applications used to interpret everything can introduce a lot of uncertainty. Having said that, you can get a rough idea of correct color by checking out certificates of authenticity from the "big 3" expertizing services. Here's a link to a genuine 510a that was certified by PSE: http://psestamp.com/Cert/1258507.* To date they have certified three 510a's, one used. The PF has also certified three genuine unused copies. But to my point above, looking at the genuine copies online, you will see noticeable differences in color shade.
* You will need to use the StampSmarter app to view PSE certs by catalog number: https://stampsmarter.org/Learning/PSEView.html
Regards,
Steve

re: #510a Or Brown Yellow?
Thanks Steve!
Seeing that, mine is not one.
Appreciate the advice!
-Ari 