Not sure what they are called so please bear with me while I attempt a description:
OH collects vintage OS maps . A few of them have come in thick, polythene (?) top-opening wallets. I cannot find these anywhere so if anyone knows where to purchase, please let me know. They must not be hole-punched, or have a flap. Just a top-opening, slip-in, polythene wallet.
Approx. size: 13x21 cms.
Thank you.