50c Error?

I'm not acquainted wqith the Bar on the 5, but the extra lines under the Emu between the legs & grass are die clash marks. I have them on several years, but can't rememeber which ones. I'll have to dig them all out & make a list. In some cases I've found die clash marks in 3 places between the top of the 0 and the lower line of the Emu's feathers. The 2 places you've pointed out are the most easily found.

I'll check my die clash 50¢ for the Bar & see if I have any with it as well. Might not be for a week or so though, I'm organising my US coins at present.

Check the Obv for lines coming out from under the Q's head towards the rim, at about 6.30- 7.00, reverse images of the grass leaves. I've got a few of those also, and they all have the die clash on the Rev as well.

There's another place on the Rev that I've found Die Clash marks as well, between the top right of the shield & the circle underneath the star, the reverse image of the Q's hair.

You'll sometimes also find die polish lines in the same area, but they tend to be longer straight lines & these also occur on the top left side between the shield & the circle underneath the star, in fact that's the most common place to find them. They often extend upwards, past the left side of the star.

Faint Die Clash marks may also be found amongst the grass behind the Roos's back. I'm not sure if I have any of these or whether I just read about it.

Do you have any of the 2007's with the really severe doubling on the lower half of the Rev? Particularly the 50 and the Emu's legs. I've got quite a lot of them.

If you haven't any & want one, PM me your address & I'll send you one. I think the die must have been well & truly worn out, but the Mint kept using it.