Regarding my original M23, I should also point out that I believe someone - a long time ago - touched up the Danish badge with some gold paint, probably an assertion of nationalism during the end-days of the Occupation. The in-service badges always seem quite visible, not overpainted, but not quite *this* bright, but I'm only going by photographs as I have never had another M23 in-hand to examine.
Here are some pics of my own 'original' (I think) M41, which is quite a bit different to yours, James. At least, I believe it to be in either original or close to original state, its hard to tell. I got it via Ebay from the Faroe Islands about twelve years ago. I always remember that because it was in the pre-Paypal era and I had a right performance getting Danish kronor to sent (people who gripe about Paypal seem to forget how dismally difficult life was without it...) and because I had to overpay the seller sent me several bags of Danish chocolate neatly packed inside the helmet as 'change'. I was also amazed at how quickly it arrived - just three days. I'd really like at least one more M23, but they seem really uncommon now, and usually go for scary prices.