Type 21B lamp with low disk foot, shallow convex body curving continuously into downturned rim, large filling hole, blunt-tipped nozzle, horizontal strap handle on body opposite nozzle. Underside reserved, ... 1st-3rd quarter ... H. 0.018, L. 0.095, Diam. of foot 0.065, Diam. max. 0.077, Diam. of filling