Besides being higher than the range of E prefix Cross in Shield Swiss Lugers discussed by Gortz and Sturgess (p. 646 in the red set), this gun is missing the dot after the E and before the digits in the serial number. Also, the font size looks off compared to G&S picture shown below.
Owning a nice C/S Swiss Luger, I can also tell you that this gun is refinished and restrawed, in case anyone is wondering or bidding.
https://www.gunbroker.com/Item/879919011