https://tuckdbpostcards.org/items/86290
The database doesn’t show a first use date. I have come across a card that has been postally used on 11/11/1907.
It is on ebay https://www.ebay.co.uk/itm/373799015183?hash=item570828530f:g:LzUAAOSwXjJhkD7x
The image is not great and I have photoshopped it if you wish to use it.
