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USCamera Import black plastic rewind knob assembly for the Pentax  K1000 (Old), Spotmatic Series, Canon AE-1, A1, Vivitar A3000, and A3800 35mm film cameras. This is not a Japanese made metal rewind knob. I found these to fit, and work properly. As with any plastic rewind knob, tighten carefully holding the knob body. Used genuine Pentax replacements are in stock here. Note the Old style K1000 has 3 screws on the bottom cover, and bottom cover is made of metal as well as the battery cover.