Andrew Nethercott Antiques has dated this piece to the 1960s.

A rare and attractive example with nice striped dial
Width 7,5/8" or 195mm, height 3,3/4" or 95mm, weight 931 grams.
In good used condition with the typical light surface wear and age marks as seen in photos.
Most of the specks on the dial look superficial and should clean off.
Andrew Nethercott Antiques has dated this piece to the 1960s.
Works of art, collectables, scientific and decorative antiques from the 17th - 20th century
You can view the stock and full dealer information on the Andrew Nethercott Antiques Profile Page