Gruen Day-Night - IMO, this is one of the coolest, but useless vintage complications because the subdial flips from white to green at 6, indicating day and night, respectively.  - 33 mm gold plated  - Serviced in 2023 - Manual wind movement that runs great  - Note that the upper left lug is slightly bent, so you need to use a larger spring bar for the top lug - $360 or obo -CONUS Shipping Only