Thanks for your response. I suppose it will live in the “O” of EFO collecting for now.

To clean stamps I recommend using 1 cup water with a couple drops of dish soap and a cap full of hydrogen peroxide. Blend mixture, then soak the stamp…

These are from Belgium, perhaps Scott #3 & 4, 6 & 7, or 10 & 11 depending on watermarks.

I’m assuming it is hinged, based on the CV provided in the photo, as neither the listing or cert states the gum condition. I would estimate the retail…

What is the gum condition? In order for 491 to be authentic it must have no watermark. Also 491 only comes in carmine color, and this image looks more…

Brookman is the go-to I usually use for sheet values. I treat their pricing like a Scott catalogue value. I would aim to get anywhere from 10%-50% cat…