I've had this one a long time and it's always puzzled me as to whether the Lemania signed crown is original to the watch. The case and movement are both signed Tissot.

Any thoughts would be appreciated.

 

First of all, dibs. Although I believe these were all assembled by Lemania for Tissot, I have never seen another example with either a Tissot logo or a Lemania logo on the crown. All have been unsigned. I think mine is slightly later than yours, and it is unsigned:

 

For what's it's worth I've run across two additional examples with the Lemania crown.

 

I have a later Seastar with Lemania 1281. Seen a few of these 1281s and all crowns were unsigned but most had a Criss cross crown pattern like mine below.
Cheers