are you really giving this to your wife?

welcome
According to Jan Still, 1918 Erfurt Lugers are reported in the observed low serial number of 304 to observed high serial number of 7538t and were manufactured with hold-open, stock lug, and relieved sear bar. Almost all have the receiver cut for the artillery rear sight. Inspection marks were stamped on all parts except springs. They all have three acceptance stamps on the right receiver. Estimated production: 175,000. One with 90% bluing is around $1,500.