The orange one is the normal one, and a R62e is labeled as an orange, green. This stamp looks actually brown. Is this a chemical reaction perhaps from an orange variety or could it possibly be the orange, green?
Your "brown" revenue stamp is really a heavily "oxidized" orange stamp. The term "oxidation" is technically misleading, because I seem to recall that it is really a compound of sulfur that forms with the orange ink. A remedy I have often used is a little bit of store bought hydrogen peroxide and a watermark detecting tray. several minutes in the peroxide and the stamp will be bright and fresh orange. Have even done this with mint stamps, but the process involves very small paint brushes, no watermark tray and a whole lot of time.
Still brown albeit brighter. I do not disagree with your assessment but it does not want to go back to orange and of the hundred or so of these stamps I have it's the only one this far from color.... need I brush it with a paint brush while it's under the solution?
On a mint stamp with gum, I carefully brush on the hydrogen peroxide so that it does not "leak" over the sides to the gum. Also taking care not to apply too much so that it would soak through the paper. Usually fresh peroxide does better. As hydrogen peroxide ages it turns to water! Might try some fresh peroxide. Or maybe the ink is completely "oxidized."
Ken, both 1st and second images of the "brown" show signs of the orange. The 1st haveing outer parts as ornge,should have been a clue. If it were brown,or any other color,it would have been consistant throughout the design. In 2nd image,it changes the vignetta portion closer to orange than assumed brown.I think the vignett is what threw you off. As George mentioned,it may be just too far toward complete oxidation to be recovered as a good copy of the orange.There's definetly no "green" involved. IMHO you have an oxidized orange, badly oxidized.
I've seen this in many of the older issues involving oranges and yellows. Examples-178,416,558/587, 603,723,and C19.
The stamp, or stamps in this case, have no value except my curiosity. I would like to thank everyone for their input .... they're now put away and I'm onto other things, aka, redrawing new pages for all the back of the book collectibles. Perry
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