I'm looking at a Holland & Holland Side Lever Falling Block Single Shot in 45/70. I'm not familiar with this rifle at all. It surely must have been re-barreled as I doubt H&H made it in 45/70.

This one is quite plain. It has what look like, stock reinforcement down either side through the pistol grip.

Can anyone point me at good source? Any history would be appreciated. There are dates on it but I don't believe they correspond with production dates.