Haenel ID issues...

[windowrest]

I have been kindly volunteered to sort out a friends Haenel air rifle. It's a budgy little thing, similar size to a Weblet Junior, but with a groove down either side of the front of the stock. It has a brass sleeve over the butt end of the action, with 'haenel 40' stamped on it... Easy,'I thought- Chambers, spring, washers and all the gubbins for Haenel 40 please! but they list a 1, 2, 300, 302, 303 or 311.
So, what is it?

[Garvin]

I have been kindly volunteered to sort out a friends Haenel air rifle. It's a budgy little thing, similar size to a Weblet Junior, but with a groove down either side of the front of the stock. It has a brass sleeve over the butt end of the action, with 'haenel 40' stamped on it... Easy,'I thought- Chambers, spring, washers and all the gubbins for Haenel 40 please! but they list a 1, 2, 300, 302, 303 or 311.
So, what is it?

It's a 1930s kid's rifle, very similar to the Diana model 22, according to John Walter.

[windowrest]

Cheers that man, I shall look slightly less ignomorous in Chambers tomorrow now.