If you'd posted this yesterday you could have had mine!
I've been wearing a Citizen BT0001 for the last few weeks (swapped it yesterday for a Seiko Monster!)
Great build quality, I think they were about £300 new but they regularly change hands for £100 on the second hand market - maybe have a look on e.bay?
https://www.google.co.uk/url?sa=i&rc...84731057669107
Nice on a strap but mine was the bracelet version which just adds a bit of bulk. I like the double date window and sub seconds.
I don't think you could accidentally corrupt the calendar, I think you have to have the crown in "setting" position.