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General Philatelic/Newcomer Cnr : Question - Edison 1929 First Lamp - Coil vs Flat Plate vs Rotary

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JohnnyRockets
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12 Mar 2018
02:39:50pm
Hi all,

I have this stamp and was trying to determine which one I had.

How can you tell a Coil from a Flat Plate from a Rotary manufactured/printed stamp?


Image Not Found


Thanks,


JR

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angore
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Collector, Moderator
12 Mar 2018
03:04:27pm
re: Question - Edison 1929 First Lamp - Coil vs Flat Plate vs Rotary

I believe all coil (perfs on 2 sides) versions where Rotary Press. The sheet version was available in both. Rotary press stamps used curved plates so the actual printed image is slightly taller or wide than the flat.

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51Studebaker
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Dialysis, damned if you do...dead if you don't
12 Mar 2018
03:25:35pm
re: Question - Edison 1929 First Lamp - Coil vs Flat Plate vs Rotary

More info...

http://stampsmarter.com/learning/Manuf_printingmethods.html

http://www.stampsmarter.com/1847usa/ByYear/1929.html

Don

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