Per Eugene Myszkowski, "The Winchester-Lee Rifle", page 88 - Appendix:

"US Naval Militia Purchase

Same specifications as first contract.

Identifying Characteristics:
Hardened screw in side of receiver.
Low bolt stop and firing pin lock.
Gas shield machined as part of bolt.
Sighting groove in top of bolt.
Winchester serial number between 11252 - 14183
stamped lightly on right receiver rail.
USNM number between 1 -186 stamped on receiver ring.
Inspector stamps:
Receiver ring:       U.S.N.M.
                           (anchor)
                            No. xxx
                             X.X.X.
Numbers 1 - 70 inspected by JNJ, 71 - 86 by CAB and 87 - 186 by FHS."

Culpeper's picture enhanced:

---