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Post by msindc on Feb 11, 2024 21:46:53 GMT
Folks: Can you please tell me what stamp this is?  Micah |
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dorincard
Member 
Posts: 1,454 
What I collect: My focus is on Wild Mammals on maximum cards. Occasionally, I get or create maximum cards with other animals, or any other topic.
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Post by dorincard on Feb 11, 2024 21:52:37 GMT
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Post by carabop on Feb 11, 2024 22:18:28 GMT
msindcIf I am seeing your perforations correctly and it is perforated 11 the stamp is Scott #610. The other 2 issues of the same looking stamp are for imperforate it would be Scott #611 and for perforation 10 rotary it would be Scott #612. Unless you have the very rare rotary perforated 11 that would be Scott #613. Highly unlikely that is the case for the one you posted. If you need more help with other stamps just ask. Someone is always pleased to help. Carabop
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Post by msindc on Feb 12, 2024 13:28:10 GMT
I guess I'm wondering how to distinguish between the 610 and 613? I assume the rotary is a teeny bit larger, but on the SwedithTiger page 613 appears to be slightly shorter!
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Post by carabop on Feb 12, 2024 14:22:56 GMT
Yes the 613 rotary would be larger. I have never seen one myself and I have been collecting USA for over 35 years.
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salmantino
Member
Posts: 266
What I collect: Specialised UK and overprints, Ireland, Netherlands, Spanish permanent stamps.
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Post by salmantino on Feb 12, 2024 14:48:24 GMT
I guess I'm wondering how to distinguish between the 610 and 613? I assume the rotary is a teeny bit larger, but on the SwedithTiger page 613 appears to be slightly shorter! The rotary plate being bend stretched causing this to be larger in one direction and narrower in the other. Be careful using the Swedish tiger. 1. It suggests to use a stamp as an overlay that is from a completely different set than the Harding stamp and, therefore, a doubtful overlay, 2. Shrinkage occurs, especially when soaking in hot water. There is some variation in the size to be expected Also, the flat-plate printing may show some offset (US collectors tend to call it setoff) on the reverse from the stacking of sheets. Furthermore, the 613 tends to have traces of incomplete plate-whiping Having seen many posts about this stamp and not being familiar with US stamps, I have learned two things. 1. The Swedish Tiger is a major contributor to false identification of that Scott #613. 2. (Do not take this as a personal criticism) It is never Scott 613. As someone once posted about one of these extremely rare stamps identified by the Swedish Tiger: it is not a Scot 613 until an APS certificate states differently. |
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Post by carabop on Feb 13, 2024 1:40:09 GMT
Thank you salmantino for explaining that well. Sometimes I have a hard time putting into words what I am thinking. |
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gstamps
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Posts: 664
Member is Online
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Post by gstamps on Feb 13, 2024 8:40:46 GMT
I searched and read on the net about Scott 610-613 stamps. (including Linn's article - no opinion for 613)  I am not a collector of US stamps and I realized that I do not know anything for sure about the production of US stamps. I have some questions for this series of stamps: For "Flat plate printings" (Scott 610,611) Is the printing done on gummed paper? For "Rotary press printings" (Scott 612,613): I do not know for sure the sequence of operations performed on this press: Is the paper roll without gum? Is the printing done on wet or dry paper? Is paper gumming still done on this press? Are there gum break lines? Is the punching of stamps still done on this press? or they are cut sheet and the perforation is done on different machines. (a necessary time for the rubber to dry) I found a description of rotary perforation: "The early perforators used in the U.S. were rotary machines consisting of wheels with pins and matching wheels with holes. Perforation was accomplished in one direction at a time (“1-way perforation”) by passing the sheets of stamps between these matching sets of rotating wheels.[5] Different configurations of the wheel spacings were required for perforating the two directions of the sheet since the stamps were not square. " Is it applicable to this stamp set? What is the diameter of these rotation wheels? |
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