It says Enfield under the crown on I believe the right hand side of the buttsocket when sighting the rifle. Does not say RSAF Enfield, just Enfield. Then 1916 under that, and ShTLE III* below that. It looks like in the pics under the rear sight, a possible " HV " stamping. I can try to send pics to you for a better overview from someone with better knowledge. Were the bayonets serial numbered to individual rifles as well?