Australian Coin Errors

Dear Community,

I am new to coin collecting and would very much value your opinions on 3 specific, very unusual coins I have found in my money box.

The first is a 50 cent 1977 Jubilee with an unusual circle below the Queens hair. It weighs 15.73 and its dimensions are 31.2.

Visible to the naked eye.

The second is a 1999 $2 coin which appears to have a crack right through the Queens head. Weight 6.54, dimensions 20.5 Visible to the naked eye.

The 3rd is quite unusual. It is a 1981 10 cent. If you are able to, please zoom in on the S.D. initial. It looks like a snake and an alien. Weight is 5.62, dimensions 23.6. Obvious through microscope. I don't know any SD initials visible to the naked eye, they are all so tiny :)

Thank you for taking your time to look at my coins and I will appreciate your comments.

Sorry, I think I've posted this in the wrong area.

 Coin 2 is a die crack, and quite a nice one. 

https://en.wikipedia.org/wiki/Die_defect 

https://en.numista.com/forum/topic70807.html - just one of several topics 

ZacUK

 Coin 2 is a die crack, and quite a nice one. 

https://en.wikipedia.org/wiki/Die_defect 

https://en.numista.com/forum/topic70807.html - just one of several topics 

Hi Zac,

Thank you for putting me in the right section and for the links. Very helpful.

Have a great day.

I've found another error coin. D 25mm W 8.94.

Multiple rim errors, Queens missing the tip of her nose, her mouth has a weird squiggle, definitely not normal. 

lavanderlilly

I've found another error coin. D 25mm W 8.94.

 

Multiple rim errors, Queens missing the tip of her nose, her mouth has a weird squiggle, definitely not normal. 

 

I don’t think these are errors, but PMD.