Marcus Hanke[PuristSPro Moderator]
11297
Omega certainly has some of the most attractive (solid) casebacks! I cannot compete ...
... but offer the few nice casebacks I have or had in my collection:
Longines Flagship:

Breitling Chronomat Frecce Tricolori

Eberhard Chronomaster, also Frecce Tricolori

Heuer Monza:

Ulysse Nardin San Marco Dual Time:

That's it!
Marcus