strange optic for identification please.

[odin007]

hello,
i have found this optic, but i have no idea about his nationality and the period. there is no stamp. i think for a model for the marine but i am not sure.
thanks for your help

[Mikedenmark]

It looks like the center part of a level or a transit. Both are surveying instruments.

I cannot say which maker.

[odin007]

Thanks, i have se same idea but i was not certain.
best regards