Another good find, I recently acquired two vintage safety razors from a local antique shop. One was a Gillette Slim Adjustable and the other was a Gillette Superspeed Black Tip.
As you can see from the pictures below, they definitely need a good clean. Luckily both razors still had their plating in tact and just needed a good scrub.
So as usual I started with several hot water soaks, brushed them with a toothbrush to get all the dirt out of the nook and crannies and then finished off with some good metal polish. I personally use Mass Metal Polish, but if you can't get hold of it there are other good alternatives.
Read my guide on cleaning vintage safety razors to see the steps in detail.