Very nice pairing, especially with the bayonets.
What iteration is the 1905? 3*? I can't quite make out the rear handguard or rear sight. Have you deciphered the markings on the buttstock yet?
I think the 1905 is a beautiful rifle. I'm envious of your Mk III, as I've yet to come across one I can afford.
If you want some age-appropriate slings for them, you could try John Denner.