Have two 547 9m revs. 4" one std boxed fired 150 rds only,the other new in box never fired.This one is a puzzle as it is fitted with a full length rib with adjustable R/sight,the name Talamade is stamped on the left of the rib below the F/sight.Both s/ns start with 9D36xxx & 9D37xxx Has anyone any info on who fitted ribs etc on this model. can supply pics to any priv email address if wanted as Im not able to sort out the forum system.Getting to darned old. Thanks Kestral