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Robert DickI have been collecting the numbered Orbit pins for quite a while. There are a total of 12 variations. There are the 3 common ones, #'s 31, 32, & 33. The other 9 are #15 Bartell, #16 Bush, #20 Fonseca, #21 Martin, #22 Collins, #26 Grimes, #27 Alexander, #35 Vosmik and #38 Earnshaw for a total of 66 pins.