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I am thinking of putting a sapphire crystal on my 7549 7010. Is the crystal held in place with a compression retaining ring or is the retaining ring threaded in to the case.

Regards,

Andries Westerbaan
 

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Its held in by a screw in hold down ring (glass fixing ring), its a stepped edge xtal and also uses a teflon type ring under the hold down ring.

7549

7548


Jim
WISconsin USA
 
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