Here are some specs of the pre-WW2 Haenels, dating from about 1932:
Haenel details
Here are some specs of the pre-WW2 Haenels, dating from about 1932:
Haenel details
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.