Dude this is sick! I wish this supported my F-105W because I really prefer the better backlight. Does anyone know anything similar for this model?
The backlight is integrated into the movement. SWP has a red, green and blue LED, depending on whatever suits your preference.
It's also compatible with the A158WA-1, which is basically an F91W, but with a steel case (the steel bracelet can be replaced with an 18mm leather strap if you prefer).
I haven't put the SWP in yet, so I can't comment on how good it is, but it looks very promising.
BTW, if you want the high accuracy feature, you have to change some settings and flash a new firmware with nanosec enabled.
Ollee watch [1] is compatible with F-105W:
> Tested: All Casio A168 and F-105W models that use module 3298 (manufactured since ~2012).
[1] https://www.olleewatch.com/shop/p/ollee-watch-one-kit-syp37