Identify modern maker's mark from 1973?

I’m trying to identify this maker (of a set of sterling placecard holders). The date mark looks to me to be London, 1973, and the Maker’s Mark is AGP (see photos). So far I’ve not found where you can even look up more modern marks.

There is no comprehensive resource for modern British makers’ marks. I do my best on my site but that depends on the marks which I actually see and the even smaller number which I have managed to identify. I have not previously seen this AGP mark and cannot identify it. However the London Assay Office may be able to do so, although whether this service is currently running I don’t know.


Thanks, Phil! If I find out I’ll let you know for your own site.