The Type is stamped on cover plate, following "Tipo" (which in my wisdom I deduce is Italian for Type). It will take the form of DCOE40 (or 45 I guess) followed by some more figures. (e.g. 34 or 35 as in my case). This was the reason for my initial interest as this Type, fitted to my '92 Factory CKD 1600 Crossflow, seems to vary from the "usual"151 (if anything can be regarded as "usual" in Caterham production). I wondered if Caterham had got hold of a batch of carbs which were not their ususal spec and fitted these to a batch of Sevens at one time. (No Factory Records exist, nor would I expect them to, to detail this, as checked with Martin Phipps), My Carbs perform fine, presumably being fitted with the requisite jets for Caterham application, as noted above would be done to the 151s