Hello and welcome!
You have come to one of the several right places.
The * W mark indicates the Controller of Proof was Wolfs Nicolas who used that mark from 1952-1968. The internal extractor was eliminated in 1962, the scallop/thumbprint on the right side/front of the slide was eliminated in 1960ish. Yours would then possibly be from 1952-1962.
The serial number does not help all that much. I have a 1950 model with a serial number of 28,9XX. I have photos of a pistol from another enthusiast with SN 56,6XX. It has a date code for 1952 located on the front of the trigger guard on the right side which is the numeral 2 in a partial box. This type of mark may also be found on other parts (barrel, inside the slide, frame under grips, firing pin retention plate, etc) and each may be from a different quarter or year. The number is the year it was stamped/inspected and the partial box configuration indicates the quarter of that year. See the chart attached...
If you can show us full pics of both sides of the pistol, plus closeups of other possible "date code" marks, that would help.
-I will add a closeup of my 1950 "frame" date code. It appears that in 1950 the code was stamped on the left side of the front of the trigger guard, upside down. By 1952 it seems to have moved to right side up on the right side.
-Also added is a photo of a page from a book with typical date codes for post war production up through the early '60s.
Please show us more pictures for our continued education!
Cheers,
Tim
Yellow circle is the date code, upside down and on the left in 1950. This configuration of the partial box indicates 4th quarter.
Green circles are Controller of Proof mark on slide and frame.