Zodiac Cal 75 Date Disc 2585/1 alternative?

[k3l3k]

Hi,

I would like to change the date disc on my Zodiac GMT (with Cal. 75). The date disc part number is 2585/1 and is quite difficult to find (or expensive). 

I am wondering if 2585/1 could be swapped with an ETA date disc (I have got several 28xx in my drawer) or any other?

Thanks,

Edited November 25, 2020 by k3l3k

[Nucejoe]

Zodiac is AS made, I don't think any part of interchange with ETA.

[k3l3k]

5 minutes ago, Nucejoe said:

Zodiac is AS made, I don't think any part of interchange with ETA.

OK. Thanks. 

Where can I look for a replacement  2585/1 date disc, if there are no alternatives?

[Nucejoe]

20 minutes ago, k3l3k said:

OK. Thanks. 

Where can I look for a replacement  2585/1 date disc, if there are no alternatives?

Have you checked with material houses, julesborel, cousins uk, ofri and the like.

[k3l3k]

Found it on ebay. Thanks

[k3l3k]

On 11/25/2020 at 10:27 PM, Nucejoe said:

Zodiac is AS made, I don't think any part of interchange with ETA.

While I wait for the date disc to arrive, could someone please help me on the winding rotor direction for this movement (Zodiac Cal 75) - is it bidirectional or unidirectional (clockwise or anti-clockwise)?

Thanks.

[Nucejoe]

1 hour ago, k3l3k said:

While I wait for the date disc to arrive, could someone please help me on the winding rotor direction for this movement (Zodiac Cal 75) - is it bidirectional or unidirectional (clockwise or anti-clockwise)?

Thanks.

Bidirectional. 

[k3l3k]

thanks

[k3l3k]

On 11/25/2020 at 10:55 PM, Nucejoe said:

Have you checked with material houses, julesborel, cousins uk, ofri and the like.

The date disc (from ebay) arrived today. The part number on it is 2557/1 and not 2585/1 (which I ordered for Cal. 75). The seller says that 2557/1 will fit, but I am not sure as 2557/1 appears to be for other Zodiac caliber's (e.g. Cal. 86 day date model among others). Shall I return or press on with 2557/1? 

Any direction is much appreciated.

[Nucejoe]

According to Dr ranfft, Zodiac 86 & 75 are both based on manual wind AS1687/1688, so date rings should interchange.