Australia 1938 Crown help ?

Ok so I won this crown which I was quite pleased with, given the weight is correct, the thickness is correct and it conducted cold from the ice cube test perfectly well, my problem is it seems to be smaller than the billed 38.5mm coming in at a lot neater to 38mm I've never heard of a fake having the same weight as the genuine article without being bigger or thicker, does anyone have any ideas ?
This is the suspect.

 

Log in or Sign up to hide this ad.

First time I ever heard of this test.. explain if you may

 

The weight looks good. Can you show us the edge? Maybe worn down a bit?

 

Gloves?

 

Haven't any left ha

 

Rare earth magnet slowly sliding off it will confirm Sterling silver content.
Looks ok to me.

 

Nice coin. I got mine for 45 dollars several years ago.

 

That's what I was thinking Davey, I had a really strong magnet with a hook on it for years and it didn't stick, I'll have to buy an earth magnet !

 

Here is a couple of better side shots & some pics through the loupe of the surfaces.

 

Sorry paddy, you hold the coin by its edges and run an ice cube into the centre of it if it's proper silver it'll very quickly go freezing cold since silver is a good conducter.

 

Yes, and please stop holding it by the face!

 

I do what I have to. My pair of gloves I had before had to be used at work to help with my dermatitis. I'll have to get more !

 

What are you using to measure the diameter? Anything other than a caliper will not be reliable when you are talking about tenths of a millimeter.
The coin looks fine.

 

Yeah, I know. I'm using a steel rule :O haha. Not ideal I know but I also gauged it against my other crowns
This is my magnet.

 

You may be working off the wrong information.

NCG world coin price guide lists the 1937 Australian crown at 37.9mm. I own the 1937, and it is, in fact, 37.9mm, so I trust this information.

The same source lists the 1938 as exactly 38mm, so I think you're fine. (The George VI British crown is 38.61, so perhaps some sources mistakenly assign this dimension to other crowns of the empire during this period. Numista, for one, does this.)

For what it's worth, your crown looks 100% genuine to me.

 

One more thing . . . as a long-time world collector, I've learned to check this kind of information across multiple sources. You'd be surprised how much spec data differs from one source to another.

I've found the NGC world coin price guide to be consistently accurate. The only problem with them is that they don't list physical specs for every single coin in their database, so sometimes I have to rely on other sources.

 

Thanks, the Victoria museum has one that claims 38mm too

 

I think it looks good.

 

Thanks, it really baffles me that they didn't mint using the imperial standard sizing.