Sometime back in the 1970s I bought a lightmeter made by Gossen called the
Pilot 2 that used a selenium cell. I loved that meter - easy to use and carry, and no batteries! However, with advanced age, it became significantly inaccurate. As far as I know, no one is still using selenium cells to make lightmeters today.
My recommendation would be to get a modern meter, most of which are going to use a silicon-type cell. Personally, I would demand the capability to take an incident reading.
Sekonic makes a small analog meter called the Twinnmate L-208 that might work for you. It uses a silicon cell and has an analog dial.
However, I did not like my L-208. It was OK for taking readings (both reflected and incident), but the dial seemed rather loose. Not as solid as I would have liked. I think the Gossen Digisix 2 may be about the same size as the L-208, and maybe more solidly built(?) but I've never used one.
My Gossen Luna-Lux is very solid, reliable, and accurate. The Luna-Lux uses a modern "silicon blue cell" (sbc) and a modern battery (9V). But I think it takes up too much room in my camera bag, so I rarely carry it.
Although I prefer an analog dial, the one I carry most often is my Sekonic Flashmate L-308s digital meter. In the photo below, the L-308 does not look all that much smaller than the Luna-Lux -- but in actual use, the L-308 is much more compact to carry and convenient to use. For me, anyway.