Wittnauer Electro-Chron

[LittleWatchShop]

Several years ago, I dug this out of my dad's box-o-watches.  Further research indicated it is somewhat rare. The battery that it used is no longer available--it is shaped like a flying saucer with lines to fit the case back.  Needless to say, no modern battery would fit this profile.  Fortunately, 1.5 volts is the battery voltage required and others had already discovered that a 389 was the correct thickness.  Someone in the UK had produced some spacers that would fit in the case back and hold the 389.  I tried to contact him...to no avail.  Undaunted, I designed a spacer and printed it with my 3D printer.  Voila!  Works great.  The pictures are of the watch and the spacer as illustrated in the 3D CAD tool.

[HectorLooi]

That sounds like the mercury battery that goes into my Nikkormat camera.

[PastorChris]

On 1/13/2021 at 9:02 PM, HectorLooi said:

That sounds like the mercury battery that goes into my Nikkormat camera.

Yeah, lots of battery adapters for older cameras for sure. 

@LittleWatchShopthat is especially nice and very "Buck Rogers" to my mind. I love the hands and especially like the fact that all 60 seconds are labeled numerically!

[LittleWatchShop]

5 minutes ago, PastorChris said:

@LittleWatchShopthat is especially nice and very "Buck Rogers" to my mind. I love the hands and especially like the fact that all 60 seconds are labeled numerically!

I have never seen an electro chron dail like this.  I wonder if it some sort of special print.