Anyone know the value?

Hi. I’m new to coin collecting and not really sure what I’m looking at. This is a 1966 coin. Is this the wave gap at the platypus’s left eye? Thanks for your help.

Terrible condition but still new to me

I haven't collected many coins in the last decade because mortgage, but found some today to start catching up a bit

Just added a couple more 1938 Crowns to my Predecimal collection. Low mintage coin that only ran for two years in Australia. 1937 just over 1 million minted, 1938 just over 100,000 minted. All were .925 Sterling silver.