Leather Washer Between spring and back block/spring guide on Bsa Imp Model D

[silva]

Leather Washer Between spring and back block/spring guide on Bsa Imp Model D ?
I have opened up quite a few, wild (none collector owned ), Bsa Improved models D's over the years. Several have had a leather washer between the spring and back block. Has anyone else found this ?. Cheers

[micky2]

I have had quite a few BSAs apart over the years and l can't remember there being a leather washer between the spring and back block on any of them.

[Binners]

I have had quite a few BSAs apart over the years and l can't remember there being a leather washer between the spring and back block on any of them.

Only stripped about 25 and none here either....

[Josie & John]

I suspect they were retro fitted as 'Power Boosters'. I know that John Knibbs used to advertise such an item but no idea what it was made of.

John

[Binners]

I suspect they were retro fitted as 'Power Boosters'. I know that John Knibbs used to advertise such an item but no idea what it was made of.

John

Probably Gold

[silva]

Have you encountered the ring of hemp twine at the end of the cutaway in the threaded part of the the block. To take up play in the cylinder, at the end of the block. Sometimes you will encounter examples with a factory screw through the cylinder. I suspect the twine might have been a factory fix when the tolerances went the wrong way. They can't really wear there....they must have been loose when they left the factory.