I've also posted this in the WW1 Imperial section but thought I best show you Maxim blokes as well.
A complete Emil Busch A-G Z.F.12 MG08 "Maxim" optical sight.
I believe complete unit's are quite rare and this Zielfernrohr has it's original case and the two filter len's (yellow and green).
This sight is in full operating condition and the optic's are clear and unscratched.
It appears to be a late build 62546 but I believe it's WW1 era due to the leather eye cup as rubber was used on most post war models.The cup is in beautiful condition,still soft and supple.
The case is of compressed card type construction and is also in excellent condition for it's age.
Both filter lens are also A1.
A nice find I feel.
Thanks for looking folks