A boxed Moore & Wright screw pitch gauge
Model no 800
Whit
28 x blades comprising 1 x 55 degree screw cutting gauge plus 1 x blade each , 4, 4 1/2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 36, 40, 48 & 60 TPI
Suitable for B.S.W (Whit) & B.S.F 
See photos for condition