help needed with this gearbox Moss

[glaser 31]

I have this Moss gearbox, it has stamped into it R3 744.anyone know what bike it fit ?
thanks
Glaser

[rogerwilko]

An Aston Martin??

[chaterlea25]

Hi Glacer,
How about a few photos of the gearbox??
Moss boxes were fitted to quite a few 20's bikes, but like sturmey/albion/burman
they come in a bewildering array of fitments and sizes 
I have a Moss hand book from the 20's , I got this to assist in the rebuild of the Moss for my Chater Lea
I will check what numbers, letters are on my boxes of bits tomorrow

Regards
John

[glaser 31]

hi John,
sounds great,hope this photo is usefull
regards Glaser

[chaterlea25]

Hi Glaser,
I have never come across anything that looks like your photo 
The book I have is for 3 speed types SL3s and SM3s
From your photo yours is more like the 4 speed???
Some Moss boxes are remarkably similar to Sturmey Archer externally
BUT they do not have a crash second gear, the gears are constant mesh and the engagement is done with a sliding dog
I think I finally have all the bits to rebuild the one for my Chater Lea, I had to have some gears made and have the mainshaft ground, and the output sleeve (gear is splined on) spark eroded and a bush fitted
Hope the photos attached are of some help?
Regards
John

[glaser 31]

hi John,
ok thanks fore the help,I hoped someone mayby know what bike it could fit 
Is your bike with the moss on the photo ? ,I mayby have some spares used fore this
regrads Glaser

[chaterlea25]

Hi Glaser,
The gearbox for my Chater Lea Supersports is the one in the top pic. SL3s,
this is the one with 4 spring clutch, the other has a single spring , identified by a long threaded end on the mainshaft
Can you let me know if you have any spares for this type?
The Moss for the Chater Lea one is a close ratio type

Regards
John