Hi,
Having a tidy-up today, are these early Drummond lathe tools?
I acquired them with a lathe I purchased recently and have seen similar on 3Bay – 9 from a set asking £25! search for [Vintage lathe tools from a Drummond pre B type lathe – VGC] to see the posting. The ones on the left are 5/16 on the right 1/4.

Regards
CotswoldsPhil