Ah! Thanks for the link. How big are these dimension wise?
The case is 36mm square. As you might expect, per the rules of geometry, these wear a lot bigger than a round 36mm watch. I'll post some comparison photos later for scale.
Here is the silver Respirator A769x sammiched between two of its lobster-braceleted brethren - the A781 and the Astronic - for scale. The A781 and the Astronic both measure 38mm across by 43mm lug-to-lug. The Respirator holds its own on that big old shackle.
And here is the A 769x again (right) with the P 7693 (left), now fully Rössler-ized (i.e. pimped out with the correct NSA bracelet, as seen on p.148).