34 minutes ago, Senior Sea Kayaker said:I'm looking at this as a separate apparatus that was used for any task that needed magnification.
A stand alone fly tying clamp would also be necessary.
Fly tying was my first thought, as this one is described but you are quite correct that it's really a general purpose "helping hands (eG-friendly Amazon.com link)" sort of thing.
Edited to add that with all these stunning food and drink photos, I can't believe I'm choosing to comment on a piece of vintage table decor 🙄
Thanks, @liamsaunt, for taking us along on these marvelous trips!