Canberra or London Mint [Resolvido]

Can anyone please tell me how to tell if one of these coins from 1966 is from Canberra or London mint? They both have high mintages and I have 2 of them but don't know which mint or if both the same one. Thank you (in advance), Phil.

https://en.numista.com/catalogue/pieces70.html

There was this topic a few months ago that showed how to tell ...
https://en.numista.com/forum/topic40798.html

Fantastic, thanks ZacUK much appreciated. Will have to dig the microscope out now to check both
Phil

Here you can find all 1966 mint-marks of Australian decimal coins.

http://www.australian-threepence.com/australian-decimal-changeover/australian-1966-decimal-coin-mint-marks/

You need extremely good magnifying glass, but I found that 2, 5 and 10 cent one is very easy to spot. With 1 cent (blunted whiskers) I found it a bit more hard.

But this mint mark spotting is a great fun :)

I suppose with London and Canberra mintages of 5 cent coins - London got the original coin stamps and Canberra a copy (that's why one spike is blunted)