Quote Originally Posted by OngBonga View Post
Well... I have some digital scales for checking my weed that weighs to 0.1g... they're not very accurate because it weighs a 2p at 7.1g (I know it's 7g because I'm a stoner and 2p coins are regularly used to weigh a quarter of an ounce).

A ten pence is coming up 6.6g.

My silver 2p is... drumroll please... 6.6g.

I think I'm just going to send it to the Mint for analysis, based on that alone. My scales are accurate enough to tell me that it is approximately the same weight as a 10p, not 2p. I can't be fucked to create a water scale when I have dodgy Chinese import digis telling me what I wanted to see.
The nice thing about a dodgy scale is it tends to be off by roughly the same amount every time. So if it says the 10p coin and your rare coin weigh the same, I'd be pretty confident.

Here's another question though: Mint coins fetch more than rusty and/or worn ones. You can get rid of the rust, but how does your coin look underneath it? Are all the ridges and other details still clear or are they worn down?