Got this one today with the 1975 offcentre 50c in another thread.
It has basically no reeding with only a very few partial lines visible. The diameter is the same as a normal 10c. I suppose it could be called a broadstrike? maybe out of collar strike?
Has a mark on the cheek but otherwise is pretty nice, probably aUNC.
(http://i1358.photobucket.com/albums/q772/enworb5/DSC05380_zpsbd3f56e8.jpg)
(http://i1358.photobucket.com/albums/q772/enworb5/DSC05379_zps207ac85d.jpg)
Yeah it's gotta be a Broadstrike Matt,the collar would normally put the reeding on the coin.
The collar must have only just been touching the coin where the partial lines are,i have a broadstrike 5 cent with a few line like that but it has spread more when struck.
By the look of the rough surface areas there may have been a small amount of grease involved,maybe very early in a run & the equipment was quite set up properly ?
I reckon you might be onto something mate. The surface is a little uneven like there may have been a sheen of grease over the die. I have a 5c like this as well so im glad to add the 10c to it.