Hi Hans,

The attached composite scan shows a stamp which I believe to be tryk 4  pos. 93  RM5R  together with an enlarged portion of the same stamp.  It appears to me to be OF15 and not OF14. Thus tryk 4  pos. 93 should be OF 15.

Along side are two scans of tryk 6  pos. 39  OF14 and tryk 6  pos.34, RM5A OF15  for comparison of the two OFs.   

Does anyone agree with me?

Best wishes,
Ed Mildenhall