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In Confusion Here About Flat Versus Rotary

 
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Author Previous TopicReplies: 11 / Views: 498Next Topic  
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Posted 06/17/2021   2:03 pm  Show Profile Bookmark this topic Add PKsPassport to your friends list Get a Link to this Message

I realize I think that rotary are either taller or wider than flat plate. My problem are with the measurements. Can flat plates be 19 1/2x 22 1/2 in other words around the 19's x 20's ??
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Posted 06/17/2021   2:19 pm  Show Profile Check 51studebaker's eBay Listings Bookmark this reply Add 51studebaker to your friends list  Get a Link to this Reply
The dimensions are the very last thing to consider, the tolerances are simply too small to be accurately measured (even with calipers). Inexperienced hobbyists tend to gravitate to using dimensions because they think them simple and definitive. (And then get all excited thinking they have a rarity after only using incorrect measurements.)

Use the other methods, outlined in a number of threads in this community or in these links
https://stampsmarter.org/learning/I...arities.html
https://stampsmarter.org/learning/M...methods.html

Don
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Posted 06/17/2021   2:21 pm  Show Profile Bookmark this reply Add revcollector to your friends list  Get a Link to this Reply
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Posted 06/17/2021   3:21 pm  Show Profile Bookmark this reply Add percyjgp to your friends list  Get a Link to this Reply


I use the method of cutting the corners off cheap flat plate or rotary stamps and then compare.
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Posted 06/17/2021   3:24 pm  Show Profile Bookmark this reply Add John Becker to your friends list  Get a Link to this Reply
PK,
Your question is fairly broad and general.
Please post a hi-resolution scan of the front AND back of a sample or two and we can take you through some of the high points. It's not all about measurement.
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Posted 06/17/2021   6:01 pm  Show Profile Bookmark this reply Add PKsPassport to your friends list  Get a Link to this Reply
I appreciate all the replies and will post some pics. Was trying to understand what was written in H.E. Harris & Co " How to collect stamps " but left something to be desired. Still was informative.



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Posted 06/17/2021   6:15 pm  Show Profile Bookmark this reply Add revcollector to your friends list  Get a Link to this Reply
The blocks appear to be flat, although the Franklin one cent is rotary. The three cent in an offset. The others are more difficult to tell from the scans, although I suspect they will turn out to be flat.
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Posted 06/17/2021   6:17 pm  Show Profile Bookmark this reply Add revcollector to your friends list  Get a Link to this Reply
The blocks have flat plate plate numbers, they are 498 and 499.
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Posted 06/17/2021   7:03 pm  Show Profile Check 51studebaker's eBay Listings Bookmark this reply Add 51studebaker to your friends list  Get a Link to this Reply
IDing stamps with attached plate block numbers is typically easy, you simply do a lookup on the plate number itself.
https://stampsmarter.org/features/P...ockHome.html
(Click on 'Search By Plate Number' tab', enter your plate number, click on Search button).
Don
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Posted 06/17/2021   8:34 pm  Show Profile Bookmark this reply Add revcollector to your friends list  Get a Link to this Reply
That's what I did.
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Posted 06/17/2021   9:22 pm  Show Profile Bookmark this reply Add PKsPassport to your friends list  Get a Link to this Reply

Outstanding you've all gave me food for thought. Don I also downloaded those sites you sent. Jumped in and started reading and am enjoying the information. Thanks to all
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Posted 06/19/2021   07:34 am  Show Profile Bookmark this reply Add jbcev80 to your friends list  Get a Link to this Reply
Hi

There is a set of Colombia stamps that were printed both flat and rotary press. When in Colombia, the stamp dealer showed me how to tell the difference without any difficulty.

In general, obtain a known copy of both stamps, flat and rotary. Mount them and use it as a "template". Lay the questionable stamp on top of one of them, line up a corner, and one should be able to tell immediately.

Jerry B
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