One thing very interesting about your gun is the "barrel" shaped extractor rod knob. It's a pre war knob and a few were still seen on very early post war guns, the Transitional models.
Extractor rods from the period of your serial # is 1954-55 were all straight rods with the tip knurled.
Extractor rods from the period of your serial # is 1954-55 were all straight rods with the tip knurled.