19b.bk1
 Black steel, four spokes, eight holes, 9/32'' wide | 19b.bk2
 Slots instead of spokes, black | 19b.ni
 Nickel plated | 19b.ni1
 ½'' boss, nickel plated all over |
19b.ni2
 Nickel plated, ½'' boss in brass | 19b.dr1
 Dark red with ½'' boss | 19b.dr2
 Dark red, standard boss, narrow groove, ¼'' wide | 19b.rg1
 As above with dark green rims |
19b.dr
 Dark red, widest groove, 5/16'' wide | 19b.rg
 As above with dark green rims | 19b.nb
 Navy blue | 19b.re
 Red |
19b.re1
 Red with black rims, otherwise as above | 19b.re2
 Red with mazac boss (early wartime) | 19b.re3
 Bright red, as above, post-war stamped | 19b.bk3
 Black, widest groove |
19b.bk
 Black, post-war, narrowest groove, 7/32'' wide | 19b.bl
 Blue | 19b.ye
 Yellow (crane kit only) | 19b.dy
 Dark yellow |
19b.db
 Dark blue (very unusual) #sup1; |