This is a brand new brake master cylinder for Series I (ONE) long wheelbase models (107" and 109") with 11" rear brakes, Land Rover Part number part number 268982 (Girling number 64067522).

These are £271.85 from Craddocks and I have seen one on Ebay for £274.95, so here is one at a far more reasonable price.

If you have any questions please ask.