Hm, funny, that was misleading. A 1100 (usually 1,1 L) but with an S after 1100S it has an 1,3 L engine why can't they just say 1300S haha . *I got headaches*
Aha, 1100S was launched in august 1967, with (like you said) the 1275cc engine and was for the Australian market
Can you please put the year on the title?