Not sure how I missed this Pobbrett but yeah that is a pretty good match for that key. Interesting that it is the same on both sides.
In the mean time I have been doing some research on the classic era keys, mainly trying to get screen caps where possible for various reasons. One being that I wanted to see if Davison or Colin ever had good shots of their keys anywhere of any use to us. I know We saw Davison's at least twice with the most notable being in "Black Orchid". But what I found was that his key is not the standard Yale that we are used to. In fact it seems to look more in the style of the modern ERA key in that it is silver and has one rest rather than two.
Also of note is the thin short chain that will help set his key apart from the rest. Just need to find one of those now too :/ No way of telling what brand this key is though, but it does look like there is still writing or markings on the key face, not that the clarity is helpful.