Sun is down and the sky(racer) turns red.
B27 on the inside and a fascinating slide rule on the outside (tachyring and bezel don't move synchronously).
It's even more fascinating as I have no clue how it works^^ which is a shame.
For HUMPDAY, here's another sweet PARNIS I found in the back of one of my watch boxes: a GMT auto, with adjustable GMT hand. I've come to really enjoy these PARNIS watches. dave: