I haven't seen many straight razors with Washington D.C. stamps, but here are a couple I found. The first is marked D. N. Walford. The second is marked Rudolph & West Co. and was made by Griffon Cutlery.
If anyone has others with D.C. stamps I'd love to see them.
Always looking for vintage knives with Virginia, Maryland, or Washington D.C. tang stamps. Any condition.