Engine numbers

[MacMillan]

Greetings all - could someone please point me at where I can fully and properly identify my engine?  In trying to get it going again, I need to find out if it's 1507cc or 1594cc.  It's a 1964 CA Dormobile (so could've been with them for a while - since 1963 - hence the suspicon of it being 1507)  The engine number's CA30/410860.
Hope somebody out there can help.
Mick

[rossie]

most Pommie 4 cylinders were beside the dissy, never looked on a CA, but its worth a try