Error Or Manufactured?

[RChris 3]

Making a good price.....but I reckon it's a shed job. Had another halfpenny on top and then been struck with a hammer.

http://www.ebay.com/itm/370968364648?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

[just.me 23]

I agree its been manufactured, the offstruck obverse is the wrong way round. The reverse has been flattened due to the heavy strike it would require to imprint a coin onto another.

[Peckris 579]

Yes - it can't be a brockage, not with an obverse and reverse, so your shed theory is the most likely I reckon.