137.ni1
 Nickel plated, larger 3/8'' central hole | 137.ni
 Nickel plated, ½'' central hole | 137.dr
 Dark red | 137.nb
 Royal blue |
137.mr1
 Medium red (pre-war stamping) | 137.mr
 Medium red (post-war stamping) | 137.bl
 Blue | 137.zn
 Zinc plated |
137.am
 Army Multikit green (part 416) | 137.ye
 Highway Multikit yellow (part 314) | 137.db
 Dark blue | 137.dy
 Dark yellow (Highway Multikit part 314) |