Fowey River Antiques has dated this piece to the 1940s.
As you would expect the bracelet is fully hallmarked.

It measures 5.75 inches maximum and has 18mm ends but can be reduced to fit 18mm or 16mm, the size can easily be reduced by any competent jeweller.
The total weight is a 24g.
Suitable for both fixed bars and spring bars.
This is a highly collectable and extremely rare watch bracelet and much sought after.
Fowey River Antiques has dated this piece to the 1940s.
We are traditional watchmakers who specialise in the restoration of premium vintage watches.
You can view the stock and full dealer information on the Fowey River Antiques Profile Page