Here is my offering today. It is a postcard bearing the "PASSED BY/ CENSOR" mark, which appears to be Gould 5C36, identified as HMS St Vincent. It is roughly 54 x 22mm. Also an eight-barred circular mark (location?)
A few years ago, I attended a weekend away with the Germany & Colonies PS at Lichfield. On the Saturday morning, a coach load went into the city for a guided tour, followed by some free time. During this, I found myself at a market with a colleague (no names, no pack drill, Dane) and on a stall selling postcards, he fished out this card. As he does not collect this kind of thing, I bought it. He did comment that I should attempt to erase the scribbling on the card, but I pointed out that it had been addressed to a young girl and had possibly been marked by her - about 100 years ago. I felt it added to the charm of the item.
You are at liberty to disagree!