To help you, I need to know what position the crown is at on the 7009 non diver case, or a pic would be good. For the most part, the 7009 is the non-diver "day & date" version of the case reference for the 7002 "date only" version caliber diver if my memory serves me right, so depending on what model you have its very likely that it very well can be swapped into the 7002 divers case.
Your next question is a very commonly asked question, can and will auto & quartz calibers and dials be swapped or switched into vice/versa cases, the answer is yes depending on the models your interested in and as long as there like calibers of size, layout and height and crown position. The most commonly used models from SEIKO which are interchangeable from one to the others are the 7548 quartz divers into the 6309 series diver cases and vice/versa, along with the 6105 diver as well, but there are a few more limitations with the 6105, as compared to the 6309 auto & 7548 quartz calibers which are completly 100% compatible.
Hope that helps, :wink:
Cheers,
Jim