I remember messing around with the Compur shutter on my Crown Graphic and watching in horror as all the leaf shutter blades fell out and landed on the desk in front of me!
It was a defining moment!
Keith, you probably don't recognise the lens in pieces above, but it's the Nikkor-S 5cm f1.4 that came on your BD S2 😎
Works like a charm now 😉