Quote Originally Posted by ptdunk View Post

Hi Gareth,

There should be a serial number on the inside of the cocking arm that is supposed to match the serial number on the trigger block.
Have a look if you can find one, and see if they match....sometimes the cocking arm doesn't have one though.

I'd be suprised if the H.Model cylinder and BSA trigger block were factory assembled, as technically they are two different brands, albeit both manufactured by BSA.
It's definately possible though.

Not sure if the cylinder and trigger block were screwed together first, then drilled for the trigger bolts. That would mean they probably were not interchangable.

Hope someone can shed some light on it for you.

Cheers,
Matt.
Thanks for the indicator, Matt, I will have a good look on the under side of the under lever for a number in the daylight of tomorrow morning.