Clipped Planchets 10p And 2p Coins

I would suggest most likely deliberate post mint damage, all by the same hand.

They could be genuine but I doubt it. It is difficult to tell from your photos because they are small. There are three things to look for - probably more, but this is just based on what I have picked up.

When a blank is pressed the metal flows slightly under pressure into the mould. If designed right there will be the right amount of metal to flow perfectly producing a crisp design. When a clipped blank is pressed some of the metal will flow into the gap where the missing metal should have been. This has the following effects.

1. There should be a gradually increasing weakness of the design towards the edge of the clip. This would only appear in the last few mm, not across the whole coin. On the clipped coins I have, it is particularly noticable on the ring of dots just inside the rim. The design on your coins appears to be crisp right up to the edge. I suggest that this is the major giveaway that they are not genuine.

2. The Blakesley effect ( not all coins have this ). There is a weakening of the design on the edge directly opposite the clip, again caused by the flow of metal. Coins that are clipped after minting will not show this. Your coins dont have it.

3. Does the curvature of the clip approximately match the edge of a complete coin?

With closer more detailed pictures I might change my mind, but from what I can see at the moment it looks like somebody has tried to make fake error coins.

If it's not PMD, a coin of the same type should fit into the gap with no visible gap as illustrated.