Originally Posted by
brokenenglish
I have the G20 .15 in that removable front housing version as well as a G21 .35 (rear BB, front bushing). I believe my .15 has non-metallic BB's.
If I remember correctly, that .15 was replaced by the "Jubilee" version, then in 1960 by another version. The last two had one-piece crank cases. I do not have a "Jubilee" but here are pictures of the 1960 glow and diesel G20 .15's:
George