Help ID this hallmark on coin silver sugar tongs

Can anyone help identify these hallmarks on presumably American sugar tongs? I am looking for a maker. Thanks - Mike


I believe the eagle and the arm-and-hammer were used by various American makers of silverplate in the mid-19th Century. I haven’t been able to track down the “D,” however.

Are these marks attributable to Bosworth? - www.925-1000.com
John Smith Putnam
https://freepages.rootsweb.com/~silversmiths/genealogy/makers/silversmiths/137881.htm