The violet-colored expertizer mark appears to be part of the type for Julius Schlesinger and should read "J.SCHL."
Filatelia notes that his mark is not considered reliable, and is known to have been forged on the back of Hermes head stamps of Greece.
The bend in your mark appears correct, but I'm not sure about the color and clearly part of the "J" is missing -- so authenticity of the mark is still in question.
I don't recognize the blue mark.
The blue mark may be
Gebr. Senf
Leipzig
http://www.filatelia.fi/experts/areass.html
(Modified by Moderator on 2016-06-15 21:10:52)
Good eye, Nigel! I agree, it does look like his 2 line mark.
That being said, both marks appear abnormal and filatelia notes that both marks are known to be forged.
That does not mean the stamp is fake, though.
Impressive work, all. Good eyes and impressive expertise!!
Ditto BigP's comments! These expert/dealer/owner marks are interesting and it's fun to see new ones and learn more about them from members like Kim and Nigel. The filatelia link that Kim mentioned and Phos45 provided a link to can be a big help when it comes to identifying these marks. Thanks!
Below is a scan of a portion the reverse of a used copy of US Scott #O12, the 3¢ Executive Official stamp. I'm curious as to the instances of stamped lettering. Does anyone recognized them as belonging to particular dealers or expertizers? (The stamp is up for sale currently on ebay at http://www.ebay.com/itm/CKStamps-US-Official-Stamps-Collection-Scott-O12-3c-Used-CV-210-/351756700174?hash=item51e6554a0e:g:9lYAAOSwLnBXXDUq.)
re: Help with ID of image on reverse of stamp
The violet-colored expertizer mark appears to be part of the type for Julius Schlesinger and should read "J.SCHL."
Filatelia notes that his mark is not considered reliable, and is known to have been forged on the back of Hermes head stamps of Greece.
The bend in your mark appears correct, but I'm not sure about the color and clearly part of the "J" is missing -- so authenticity of the mark is still in question.
I don't recognize the blue mark.
re: Help with ID of image on reverse of stamp
The blue mark may be
Gebr. Senf
Leipzig
re: Help with ID of image on reverse of stamp
http://www.filatelia.fi/experts/areass.html
(Modified by Moderator on 2016-06-15 21:10:52)
re: Help with ID of image on reverse of stamp
Good eye, Nigel! I agree, it does look like his 2 line mark.
That being said, both marks appear abnormal and filatelia notes that both marks are known to be forged.
That does not mean the stamp is fake, though.
re: Help with ID of image on reverse of stamp
Impressive work, all. Good eyes and impressive expertise!!
re: Help with ID of image on reverse of stamp
Ditto BigP's comments! These expert/dealer/owner marks are interesting and it's fun to see new ones and learn more about them from members like Kim and Nigel. The filatelia link that Kim mentioned and Phos45 provided a link to can be a big help when it comes to identifying these marks. Thanks!