'60s Hofner Verythin semi-acoustic. Can this be made playable? PART ONE: The challenges

My vintage Hofner Verythin from the 1960s have been on my living room wall as decoration for more than 20 years. Now I have decided to make it playable again, and I hope to get some help with identifying where the serial number can be found, or at least a more clearer understanding of what year this model was made. I also would like to find a replacement bridge. But all things related to this guitar is of interest for me to discover. I found that the pickups are a kind called "staple pickups", introduced in 1954 as a more articulate version of the P-90 pickup.
Watch part two here:    • My Hofner VeryThin 1965 - restoration...  

00:00 Introduction
00:40 what are the challenges
03:10 the fretboard
04:03 the tremolo system
04:57 the tuners
05:05 what kind of model?
06:14 challenges with the electronics
08:15 listen to the tones and breakup
08:36 make a loop to jam over
10:55 final thoughts
12:49 To be continued...

Gear used:
1960s Hofner verythin with Staple pickups
Clone of a Dumble/Fuchs ODS 50 (Overdrive Special/Supreme)
Mad Professor Sweet Honey Overdrive Deluxe
Strymon El Capistan
Mad Professor Deep Blue Delay
Neunaber Wet Reverb