This type of instrument was not for making serious observations; rather, it was more a gentleman's fashion accessory.
If you look at the size, it's tiny. Would be an interesting curiosity to own.
I think the telescopes used on the battlefield would be more the stereotype ones.
My wife has a specialty scope for the visually impaired that's even smaller, fairly powerful, has a good image and focuses down to a foot or two away from the scope, but it's modern. If you never looked through it, you might think it was a fashion accessory, too.
Hook