I think you may be confusing the difference between Schmitz & Piquerez cases as the same as my statement of 'the Siffert had a deeper/thicker case'...

Yes, if you read up on the difference between Schmitz & Piquerez cases, you'll see that one has a deeper case back, and changes to the pusher cut-outs. This is not what I mean when I say the Siffert had a thicker case... The lug height of a Siffert case (and Orange Boy, and 1563 marked cases) are thicker/taller to that of the 'viceroy' models.

As for serial no's.. I can't offer much insight as I don't have that data at hand.

Stewart
- Heuerville

: Could you please help me to understand the difference in cases. Are
: you saying that cases for the Siffert model were never made by
: Schmitz, but instead by Piquerez?

: If you could, can you address the serial number question. As far as
: I know, 1163 serials are mostly in the range of 200,000 to
: 225,000. This case is 358,xxx - any ideas? By that time Heuer
: was not even producing plastic crystal Autavias.