Hi Darren, we share more than just the same first name.
I also love this first model big register Autavia - although i am still hunting a pair of illusive Dauphine hands to complete mine.

Its interesting to see your example has a few differences. The Turler co-branding on the dial has been seen before but what i think is odd the later model bezel fitted to your model. It would be interesting to see a side on photo of the watch laid on a flat surface to see which profile of screw back case your watch is housed in.

Thanks for showing us your early 2446 -
Cheers - Darren