Offset coin rim...Value

The dime on top is the dime in question - the rim in front of the nose is a lot bigger. Value increase by how much?

Value increases by 0. This is pretty common, especially in the dime.

Yes - the US dime has a lot of these. First I thought it was offcentered, then a tapered planchet, but now I think it's the hub was loose.. making the die move. But keep an eye out for the 1982 dime without a mintmark  P. I have been looking for 20 years. Still have not found.

I have read that the dime is said to have common offset rims but can anyone tell me, I have a 1892 zar 6d with definate offset rim and request any indication of how common this was in the zar coins

This could be a dryer coin. A coin gets caught in an industrial dryer, between the drum and the inner wall, and its rims are pushed down until you get a very thick-rimmed coin. I have a couple of them.

do you have an email address, I can send you a pic but this doesn't look like the case

These are common in a lot of currencies, my $A has a lot of them.