New Old Stock. 

VINTAGE. 

1960s/70s. 

Dark Brown.

Genuine Crocodile.

18mm Watchband/Strap. 

Gold Tone Buckle.
14.4mm inside buckle dimension (fourteen point four mm).

6 1/2" maximum length. 
Add this to the length between YOUR watch lugs for the total available length for your wrist circumference.