All are 494. No watermark. Please consult 1847usa.com on the http://stampsmarter web site: http://www.stampsmarter.com/1847usa...1_02main.htm Also, a 10 or 15 power loupe should be used to inspect the stamp.It can be also used to check for small faults like tears, small thins and other defects. A good loupe will return its cost many times over.
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