Above is a pic of what sometimes is presented to me as an SN60 CREB145. CREB145's are found in numbers 00,1,2,...,23 and letters A&B (so far!!).

Note in the pic I have highlighted the smaller, original number of this piece - an SN6. There are 3 variants of this 06(6) mould and two 09(9)'s. There is also a 9(9) that was made into a 09(9). Since the original SN's on these pieces are within the limits of the 00-23 scheme, logic leads one to believe these alleged SN60's are just 6 and 9 mould variants.[id=101435514] to see the alleged SN31 mould and follow the link from there for an explanation.