Vintage Heuer from aprox. 1930 Chronograph one button

Hello,
This Heuer recently arrivend to my hands and I'm wondering it's autenticity and and the value.
I have found a simmilar one in a "Complete Price Guide to Watches" from 1996
The case is Gold 18k

Here are a couple of Catalogue scans from OntheDash from 1936

Thank you a lot.
You know the aproximate price or if it is valuable?

There are quite a few differences between the models shown in the catalogue pages posted by DC above, as well as other catalogues, but also to others I’ve seen from the era.

From the catalogues this dial style in this case type is not pictured. The crown is certainly not one from the era as they were rounded overall and the element which is a bit strange is the Heuer logo being on the bottom half of the dial, unlike any others of the time based on what I’ve seen....although have extremely limited knowledge of Heuer of this era.

It's true we had to swap the crown due to a malfunction.