Neither of my 1974's have spring tabs (including a NOS system)
From what I read the short muffler was associated with 1973, the long muffler 1974... I know the history of my low mile 74 because it was on the same Oregon farm from 1974 to 2012 (hence the low miles) (It still had its original Dunlops until then also)
The other 74 (in the picture up the page) had around 4900 miles on the clock and came to Australia from the USA in 2009......... Oddly enough, when I bought my Mk2a Commando
out of the USA, the name on its US title was the same as that on the TR5T US title.
Differences that I know of are.
Header tabs (but have not seen them in person)
Kick start levers.
Does the 73 have a gearbox oil dipstick like the 74 ?
Jones or Dunlop rims (Including both on the same bike)
Considering the state of the factory in 1974 they seem to have built a lot of bikes in July (HJ) of that year or did they ?
929 1974 bikes built when or where ?