Available for Sale Now (updated Aug 2017)
Fully assembled and tested. (Kit version not available.)
Comparison of QS-18-12 and IN-14
And the unique font face of IN-14 tube:
The PCB board before installing IN-14 tubes
Bottom side of the PCB
Pin definition of GPS plug (3.5mm, same as audio)
QS-18-12 has 12 pins, while IN-14 has 13 pins.
3mm neon lamp as the colon symbol
One neon lamp on top of another, to form the colon.
And more fabulous photos: