In Japan, we have pictorial postmark, or 風景印 (in Japanese). Central post office in every prefecture (like state in USA) will have it, and also several other post offices big and small. So in 1 prefecture, there can be a lot of pictorial postmarks, each will bear the name of the post office. The closest one is 15 min away by car, from my place.
Here’s part of my collection:
It’s free, available within the designated timeline (some change theirs once a year or every 2-3 years). You just have to go there and ask for it to be used for your stamp.
You can write to them and explain you want that postmark, send all the cards/envelopes with stamps for them to stamp it, and provide a return envelope with the correct postal fee for them to send it back to you. Or you can ask them to send it to the address you wrote on each card you sent. I did it once, because I really really like the postmark of a post office in Kyoto. Which is 2 hours away by plane.
Will I trade pictorial postmark?
I did “special postmark” swaps here on the forum, twice. To make it short, both were disappointing.
I prefer to have nice postcard with nice stamps, and the nice special postmark is a plus. I kinda don’t like to get nice postmark but the card and the stamp are not so nice. It’s just my preference.
I got really nice special postmarks through swaps, tags, and official postcrossing, and it was sent with nice postcards and stamps. Better to have it like that, like receiving a surprise, rather than exchange only for special postmark.
I am still interested to do special postmark swap, but it’s not just the postmark that matters, at least to me. It’s a postcard and stamp swap too.