Guernsey Occupation Registered Cover / The Vale Postmark / First Day of Issue?

This is genuine item from the old postmaster's personal effects. Good condition with some browning spots and a good mix of occupation stamps with a rare sub post-office cancel. No cancellation or blue pencil lines on the reverse. Not sure if it is an FDC.
Better quality images available on request.
Postage o UK is for recorded delivery (hence the higher cost). I will combine postage and am happy to also send registered at cost. For international buyers its just normal post. Again if you would like a more secure postage method I am happy to oblige at cost see below for options and costs:
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I am passing on a whole collection from the old Vale postmaster so keep a lookout for other gems over the next few weeks - although these are now all nearly gone!
Any questions please feel free to ask.