BONEHILL BRITANNIA INFO PLEASE

[abewilson]

Hi any Britannia owners out there can any one give me some advice on the internals of a stamped ‘’Britannia Cox’s Patent C.G. Bonehill sole manufacturer ‘’ Reg.No.394207

About 28-30 years ago I did a refurbishment on the exterior, still pleased with my effort.
I recently re-assembled it and wonder if I have done this correctly because when it is now fired all I get is a ‘phut’ with a 5 inch spring.

First Question is what is the length of the spring for this rifle ? I have another spring almost identical to the 5 inch spring but this is 8 ½ inches long. It’s so long ago that I dismantled the Britannia I cannot remember what spring I removed.
pics on http://www.picturetrail.com/abewilson

So far I have found stamped ‘770’ in no less than 6 places Second question anyone with any more ?
Thanks in advance for any info.
ATB
abewilson

‘‘The earth is but one country and mankind its citizens’’
Baha’u’llah 1817-1892.