Saw this today in the US. In too poor a shape to interest me but the seller says the date stamp is December of 1931. Look at the pics of Diana’s dress. Per the Gallery this may be the latest leggy Diana on record?
https://imgur.com/a/Zwe33Q1
Vintage Airguns Gallery
..Above link posted with permission from Gareth W-B
In British slang an anorak is a person who has a very strong interest in niche subjects.