Fratelli Koristka - information request

[mfoolb]

Hi,

this morning at the local flea market I have found an old Fratelli Koristka 7x50 in really bad shape (chipped lens, missing eyepiece, lot of fungi) with original leather bag.

I asked the price and for 10 euro I had to buy it.

I'm trying to find information about this model but I haven't been lucky.

I know the firm Fratelli Koristka worked until 1929 but the only other model of binocular I found searching on the Internet has different marks: this one has the 'Fratelli Koristka 7x50' on the opposite side and M.M instead of M.M.I.

I was not able to find any serial number but looking at the only pictures I found the bag should be original.

Some more pictures could be find starting from here:

Fratelli Koristka | Flickr - Photo Sharing!

Does anyone has more information?

Thanks.