PRE TAG HEUER BUCKLE 
18mm 19mm or 20mm 
GENUINE CALF LEATHER STRAP
SMOOTH GRAIN 
Manufactured by
CAVADINI
ALSO 19mm STRAPS MANUFACTURED BY
CUIR DU CERVIN

The Cervin 19mm straps have different packaging and a different back stamp. They have removable quick install spring bars.  They take a 16mm buckle as opposed to Cavadini's usually 18mm buckle. They are made in Switzerland but are otherwise the same.

If you don't see your watch, please send me its name and reference number, and I will look it up

19mm
Tag Heuer, Heritage, CBE2110.FC8226,
Tag Heuer Carrera Calibre 5, WAR211A.FC6180, WAR211B.FC6181, WAS2112.FC6181, WAR215D.FC6181, WAS2111.FC6181, WAS2112.FC6181

20mm
TAG HEUER FORMULA 1, WAZ1110.FT8023, WAZ2113.FT8023, CAZ2011.FT8024
Tag Heuer, Carrera Calibre, WAR201C.FC6266,
CAR2110.FC6266, WAR201A.FC6266, CAR2111.FC6291, WAR201B.FC6291
Tag Heuer Super Professional

22mm
Tag Heuer, Monaco, WAW131A.FC6177, CAW211P.FC6356, CAW211P.FC6356, CAW2111.FC6183
Tag Heuer, Carrera Calibre 16, CV2A1R.FC6235