14k Solid Gold, 2182 Accutron, N3 (1973)
I don't have many day-date Accutrons so I don't know a lot about them but my guess,I repeat "guess", would be that the movement has been replaced with a quartz movement. Bulova did that with some Accutrons that were sent back for service. Oliver will know when he gets here.
I have an Accuquartz in which the movement has been replaced with a factory quartz movement but it is not a day-date.
Yep, that's it! Only the 230 Accutron mvt. had 2-letter Day wheels - for both the the women's and men's sub calibers. While the 230 service manual shows 3-letter Day wheels, they were never actually used by Bulova. If it doesn't hum and the second hand jumps, it has had the original mvt. replaced with a quartz. It is a beautiful and unusual watch and deserves the correct tuning fork mvt. Thanks for sharing.