Yup. In this particular case look for a number on the bottom of the butt, and also the letters "V" or "VS". The same number, without the letters if there were any on the butt, should be stamped on the rear face of the cylinder and the bottom of the barrel above the ejector rod. The number you showed inside the yoke cut-out is an assembly number, not a serial - and for purposes of identification it is meaningless.