Mickey Padge Posted March 21, 2011 Report Share Posted March 21, 2011 Hey fellow RWG'ers! I have an old school PAM 063C, and the trouble is the Jakob case back will not screw down, it leaves a 1mm gap after a few turns...... Anyone else have an old school GMT PAM (029/063) and been successful with Jakob's sweet custom case backs? Original case back on the left, Jakob's on the right.... Click to expand: I thought at first the case back might be pressing against the movement retainer, but decasing the whole movement disproved that theory. So it screws on a few turns as smooth as butter, then just stops with a gap, easily large enough to place a finger nail..... Any help would be greatly appreciated! Quote Link to comment Share on other sites More sharing options...
Mickey Padge Posted March 22, 2011 Author Report Share Posted March 22, 2011 Nobody has used an old school PAM rep with Jakob's custom case back? Quote Link to comment Share on other sites More sharing options...
tutima Posted March 22, 2011 Report Share Posted March 22, 2011 I would not bother... The Honpo CB is better if one can live with the incorrect C serial... Quote Link to comment Share on other sites More sharing options...
w0lf Posted March 22, 2011 Report Share Posted March 22, 2011 There is a batch of Jakob 63C casebacks that had a wide threaded rim and a wider slope. It is based on stock for a thicker 7750 movement & rotor, and as such it may not screw in all the way into a manual case (the rim will hit the movement bridge) or an oldschool auto (the rim will hit the movement ring or run out of threads). Besides it being incorrect for a 289x watch due to appearance of the slope it's also incorrect in design. OEM and Honpo/EL 289x caseback has a movement ring holder. 7750 caseback (PAM88): 289x caseback (PAM63): OEM caseback showing movement ring prop holder: Quote Link to comment Share on other sites More sharing options...
Mickey Padge Posted March 22, 2011 Author Report Share Posted March 22, 2011 Ah I see, so the case back is not going to fit by design! Thanks very much for the info guys! Quote Link to comment Share on other sites More sharing options...
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