1912 Boston MA stamped envleope to J.M Bartels Co. (stamp dealer) in New York.  Flag machine cancel #12; corner card of Loring, Coolidge & Noble.  Stray numeral markigns at right; may have been used to test some handstamps or some such thing.

Your satisfaction is guaranteed. APS member since 1992 and ebay seller since 1996; this is just an ID for selling material all starting under $10.  I'm an accredited APS dealer member (Matthew Liebson, PaperHistory LLC).  See additional auctions under IDs budgetcoverbox and paperhistory.  Please consider joining the American Philatelic Society! 

I combine shipping on won items but please aggregate things in your cart and pay in a single payment when possible, or I will send an invoice to combine when I see multiple winnings. 

As of March 2024, I am using ebay standard envelope wherever possible, first class letter mail otherwise, and ground advantage for domestic items over $50.  ebay international shipping is used for high value international shipments.