One of my vices is vices. Yankee No 933

 This drill press vise was part of the line of Yankee Tools made by North Brothers Manufacturing (see The Duke's previous post) and best known for the spiral-drive Yankee screwdriver. 

The various models of vise were identified as follows;

 991    1 1/2" Vise w/ v-groove block 
 991A 1 1/2" Vise 
 992    2" Vise w/ v-groove block 
 992A 2 1/4" Vise 
 993    2 3/4" Vise w/ v-groove block 
 993A 3" Vise 
 994    4" Vise w/ v-groove block 
 994A  4" Vise

Popular Science 1919