Not come across that one, I didn't think Gandolfi used circular lens boards but late 1890's adverts show they didHere's one I got recently, I believe it's one of the models Louis made in the 1890's before he settled on the pro. designs that became well known. Called the 'Special', when it was sold in an outfit like this it was called the 'Briton'. For the chaps in straw boaters to carry on their new bicycles, it was good quality but simpler, & I don't think he was making much money, all those bought in extras must have affected his bottom line. No makers name, but it matches the 1890's adverts.