Maybe older, probably not much newer though. Three piece slants are not that common, relatively speaking. The little ones like that in a metal case are the older versions.
Later ones come in a leather case with a zipper or snap.
Coles branded razors like the Merkur HD were made longer. I don't know when the last ones were made, but I'd guess the 80's.
I'm only making guesses based on the style of the cap and the fact that it's gold plated. I have seen them branded Hoffritz more often in that style in gold.