I believe these stamps are referred to as 'cinderellas' or labels rather than official postage stamps as they were privately printed as souvenirs for collectors
This coronation set depicts designs including the Imperial State Crown, St. George's Spurs and the Sovereign's Orb
No postmarks and they look to be unmounted
Hopefully the photos show you what you need to see
Happy to combine postage if you buy more than one item
Thanks for looking