A gentleman who was a friend of my Dad's in his retirement flats had a large collection of knife rests - George was 92 when he died a couple of years ago, but he was delighted to show me them all - in fact he was delighted to meet another collector of anything - somebody who would understand his passion!
I'm pretty sure he did have a set like this one. Few were marked, they can be made from many materials - silver, glass, brass, spelter, silver plate...
I used to keep my eyes open for them for George, as he was unable to get out and about himself.
I did find one unusual set, in silver plate, a kiwi-like bird on one side, a wallaby on the other.
This led me to suspect they might have been antipodean, so I would imagine they were made in various places around the world.