I've heard anecdotal evidence about fake 1905 shillings where a 5 has been transplanted onto a higher grade 190x shilling which has the final digit of the date removed. So I would avoid any 1905 shilling where the position of the 5 looks a bit off, or has surface/tooling marks around the 5, or has heavier toning around the 5. There is one on eBay at the moment that I think looks a bit questionable. I just had a look on Ebay and there are several. The dodgy one wouldn't be the one for sale on Saturday at 1:24pm ? Yep, that's the one that caught my eye. In the end it sold for £410. Judging by the positive feedback the vendor received, the buyer seems happy with it - incredible. I did report the item to eBay as a fake but, as usual, they did nothing.