ROLEX TUDOR BUCKLE 
17mm,18mm, 19mm, or 20mm
GENUINE CALF LEATHER STRAP
SMOOTH GRAIN 
Manufactured by CAVADINI
(Germany)
or
Manufactured by Cuir du Cervin
(Switzerland)

Cuir du Cervin straps have removable quick install spring bars. Cavadini straps come with regular springbars.