Hi guys,
I found nice regulator from the museum collection and realised in particular piece the caseback is plain, after reasearch I found some with plain casebacks, but Musem Collection stated to be so called limited edition (with engraved caseback as in photo), do you have an idea if there was non numbered edition after first edition?
Btw do you know if dial is enamel?
Kind regards
Filip


[Grey dealer website info cropped out -- FabR (moderator)]