This is on Ebay right now
eBay - The UK's Online Marketplace
It's a nice early pot, with PTO Medic insignia. However, the circle decal has been overpainted with a cross, looks to be the same paint as the LT. bar. Liner is ok but IMO not original to the helmet, there is no rust on the liner peak that would have been transferred from the inside of the pot.
So what do you think? Original decals? Messed with? Fake decals?