303 Target Rifle

I've been asked to price (with a view to sell) a couple of rifles. One of which is a BSA factory converted 303 target/range rifle.
It's unusual in that it has a one piece rear handguard with no cut out for the back sight. It also has a BSA marked heavy target barrel
(not the more commonly seen Lithgow H barrel) with one of the best bores I've seen on a .303

It has matching numbers on bolt receiver and nose cap, and retains its full wordwork. Overall in very tidy condition for a near 100 year old rifle.

Does anyone here know much about these rifles and care to hazard a guess as to its value?

Photos of it would help

Attachment 35433

Rear aperture sight appears to be an Australian Central which could have been made 1960s onwards. May be a Rawson which would be older but fairly certain it is the Central.

PM Tertle, he's the 'go to guy' for Lee Enfields.

Thanks to those that helped with information. Rifle has sold (pending payment).
Also been given an old bayonet that matches the rifle to sell, which I've posted in the for sale section.