Bulova 1970 International

Ladies watch with simple black dial with bark effect silver tone strap - strap not marked stainless steel, or plated.  Single diamond at 12 o'clock.  Bulova at top of dial and Quartz on bottom of the dial face.

I've recently inherited this Bulova Watch that belonged to my grandmother.  She purchased the watch in 1981 - I have the original Bulova Guarantee - and I'm trying to research the date it was actually made.  I've been trying to match the various components inside the watch to a particular date, but it looks like it may be a bit of a hybrid?  Am I right in thinking the date code is 1970?  The problem is that this doesn't seem to match with the 2650.10 reference inside.  Also the fact that it is eight jewels and the stamp on the inside of the case - 10322 seems to indicate later than 1970? I have spent a few happy hours researching various models and dates, but can't seem to find this particular variant.  I'd be very grateful for any further information and/or any suggestions as to where I can find the model and date. I really like the watch, although I have fallen in love with quite a few of the earlier 1930s watches. I have seen some absolutely beautiful watches on here. Just to add that the guarantee gives no model number or date.  Thanks so much for any help you can give.