The LB Ts with the 32TP (Lyman Alaskan) scopes are WWII. The one on CGN is a No. 4 fitted with a G&H mount and a Lyman Alaskan scope. The mount set is similar to an original mount, but as has been pointed out is not the same. The price being asked is not unreasonable given the cost of the components, if a faux sniper rifle is desired.
The second rifle is described using the term "assembled". The rings, and perhaps the scope may be authentic. These were assembled on a LB No. 4. There were a number of the 32TP scopes and rings on the market in the UKicon, 74L series, from LB No. 4 T rifles suppled to the Netherlands, and subsequently scrapped by the Dutch.