Hi Kim , your a star so you are , you know i had thought about under the grips , its about the only place i hadnt looked.Im having trouble finding a driver small enough and vaguely nervous of stripping out the thread.
I did post a query on the forum you suggested , thank you , im pretty sure when i het that screw out and can find a serial number ill know exactly which model it is.Im almost confident it has to be a 1st model as ive seen plenty of others identified as 2nd or 3rd editions , they dont look like this one though.
Theres only one thing raising a red flag in that direction is the what appears to be original holster , it has a stamp in the leather which part of says 1907.
This doesnt look like the New Departures made in 1907 , im wondering if the holster came later..unlikely perhaps..i dont know.
Ill post the serial number as soon as i can safely remove the grips , thank you Kim