Head Identification

[Tony Press]

I have a spare cast iron head with the following cast numbers,  single bolt water outlet.  What sort of engine was it from?  
Can anyone identify it please

Bob

3  11  8

1A 670

{  AF  }   ignore the curly brackets
{   2   }
{   T   }

3rd November 1928 ?

I thought a '28 had petrol tap primers in them??

My LC head with brass blanking plugs in what had been intended for priming cups is 1A38  J3 (and also AF2). I believe it to be early 1929 in keeping with the rest of the engine.

I always have trouble deciphering the Index Cards-

You are right- the earlier low compression head with tap primer plug holes was 1A 38 (Part No BC 28)

The primer holes were deleted, but other than the parts listings deleting the plugs there doesn't seem to be a change in the part number or casting number shown on the cards for this later low compression head up to 1933.

Apparently casting number 1A 670 was introduced under Part Number BC 82 in August 1933, the cards then showing this crossed out and a later casting number 1A 684 for BC 82 sometime before 1936. 

Confused of Malvern.