Please try to guess the following nos. of tramcars and how different to the nos. which I havent listed!!

#2, #5, #11, #13, #23, #29, #30, #32, #62, #65, #66, #68, #71, #77, #79, #96, #98, #111, #116, #125, #142, #147, #160 & #161,

are they the "ex-trailers" in the past ?

revised
are they the fleets for "trailer hauling" in the past ?

Bingo! Joseph!

They were all the fleet of HKT with "trailer hauling" til' 1982.