Well, I did... and T120 is listed as H4260 / H4065 while BSA is 97-4065 / 4097.
Which is why I asked the question if they were compatible.
Thanks for the response tho?
With triumph vs bsa, triumph used a H (I think earlier bikes
Used numbers?) as a designation where bsa kept to the number scheme. So 97- is equal to H. The part within that section (4065) is the same between both marques.
The longer guard is home market and general export, looks as ugly as a pig with lipstick IMO, the shorter guard was for US designation and quite possibly some bikes sold within the UK for the US forces (but that’s another story).