KEEP TABLE CLEAN, Red on White Stencil Painted Steel Sign row boat I can never pass by

I can never pass by old turned wood salt spoons

1940s or so I'd guess and in very good used condition

9 1/2" diameter at lip

1 3/4” across at lip and at base

especially along the left edge of the ruled paper

KEEP TABLE CLEAN, Red on White Stencil Painted Steel Sign row boat I can never pass bySomething related to where this sign lived on December 12, 1974 cost $6. 53 per __ (?), which someone wrote in pencil right on it. I'd like to think it lived in the studio of Donald Judd, say, who was both ordering lots of industrial material and needing the work table to be clean! Whatever the case, a satisfyingly minimalist, matter of fact sign, in perfect red on creamy white comb. On steel plate, with two holes at bottom for mounting. 7" w x 6" t,