Variation 1 C/B inspection stamp serial number range 56176-57824 (1,500 produced)

Variation 2 C/B and C/D inspection stamp serial number range 59226-68049 (8,500 produced)

Variation 3 C/D inspection stamp serial number range 66972-93471 (25,000 produced)

Variation 4 C/W inspection stamp serial number range 130308-130433 (rare)