When you said the last tram I assumed that you meant the last tram that
ran on the final day.
From the film, the fleet numbers of the trams that ran during the final week were:-
35 36 45 47 48 49 50 51 52 59 66 72 73 83 88 169 172 180 202 209 210 211 212 223 224 227 228 229
Which rather suggests that there were up to 229 (and maybe more).
And, of course. they might have lower (new) fleet numbers than the one you quoted - 236 - so I think your hunch could well be correct.
Edited to add that you quoted 263, not 236.
The various Wiki entries:-
http://en.wikipedia.org/wiki/Edinbur...ation_Tramways
http://en.wikipedia.org/wiki/Edinburgh_Trams
http://en.wikipedia.org/wiki/Leith_Corporation_Tramways
don't record fleet numbers, but I imagine that this book would:-
http://www.transportpasttimes.co.uk/...productId=1761 (and they've got one copy in stock!)