Kern anniversary clock (help with model name)

i got this at an estate sale for $15. bought the key on ebay. it works and is in wonderful condition. near mint. not sure what the model name is and how much it is worth. wondering if i made a good buy.

 

Kern is the model name. Its a anniversary clock.

 

Just noticed your title but your title in the thread is the model name

 

it is hard to find information on the kern anniversary clocks. or their approximate worth or time built. so it is hard to price it or give date on model.

 

https://www.ebay.at/sch/i.html?_fsrp=1&_nkw=kern+jahresuhr&_oaa=1

 

so, again the PITA problem with ebay links...
these Drehpendeluhren or Jahresuhren - it has nothing to do with "anniversary" but with the 400 days it doesn't need any attention - so approximately a year.
they are all 1950s and later and are sold in good nick for 90 to 250 Euros.
best place to check is ebay germany and ebay austria; not ebay switzerland though because there they prefer to buy Atmos ones...