This is vintage silverplate flatware.
BRAND: NATIONAL SILVER, NASCO
PATTERN: SEVENTEEN Art-Deco diamond inside a squared off embossed tip, bead edge
YEAR PATTERN STARTED: Unknown by me
This is 3 solid serving spoons 8". The backstamp is "N.S.C. E.P.N.S." One is nice, one is more used, and one is worn. The two more worn have heel wear or plate loss and have mild scratches. The nicest one is pretty good. The other two would be a nice craft lot.
p101