700rpm -
You must have one of the early batch of 1929 Business Coupes with the new oval windows. Great looking car, especially with the brown top material. I have seen a couple Business Coupes with the oval windows mounted in white/tan material, but yours looks better to me. 'Always wanted one of these coupes with oval windows, but the opportunity never presented itself. Maybe someday...
jdp8402 -
Since the taillight is mounted on the rear fender, chances are 50/50 that your Business Coupe had oval windows, as the taillight was relocated from the body to the fender in the May-June timeframe. If your car is later than July, 1929, it most certainly did have the windows by then. May-June could be if'y, depending upon the assembly plant.
This May-June timeframe was also when the change from seven-tooth to two-tooth steering systems took effect in passenger cars. It's easy to tell the two apart. At the steering box, the seven-tooth has only a zerk fitting or a filler pipe plug on top of the housing tube, while the two-tooth box has the zerk or plug, plus a clamp between the box and column tube. There are also a couple adjustment nuts visible on the side facing the fender. Up on the quadrant, seven-tooth columns have a longer notched quadrant arc, while the '29 two-tooth column has a shorter path with large "ears" on either end. You won't be able to see it with the light switch in place, but the seven-tooth steering wheel is splined, while the two-tooth is keyed. Modern repo steering wheels are made both ways for switching between steering systems. This makes it possible to put a red 1928 or black 1929 splined steering wheel on a '29-31 two-tooth keyed steering shaft. But that's another story.
If in doubt which steering system you have, post a photo of your steering box from the driver's side.
Marshall