OK, I did my due diligence and used the search option above before asking for help.
I did find a great website about New York stock transfer stamps
http://mysite.ncnetwork.net/res0wtj...TransferTax/but I can't seem to find my stamp...

...without an overprint.
Design used from 1908 to 1915, but they are only shown on the website with numerical overprints, either large, large in boxes or in a repeated pattern.
Can any of you revenue experts tell me more?
Mine is dirty and tired, but still proud.
