We notice that fewer of these early Cloth Flashes in such MINT Condition are coming up for sale. This one has never been sewn up. See Colin Owen's Book; Ref C 1123.

All we have on 51 Battalion is that they were one of the units that was in operation in South West Africa in the early days.
"Quartermaster's Comment":- Dudley Wall notes that they were based at RUACANA; this would have been from around 1972/4.