A request for Selmer Paris measurements

[Windsong]

I am in need of dimensions from anyone with any of the following Selmer Paris models: 

-Later Balanced Tone (1948-on)
-Centered Tone (all)
-Series 9 (all)

Specifically, I need the exact distance between posts for the upper bridge key AND lower bridge key.  These are the outswept, triangular-ramped bridge keys that have become a ubiquitous Selmer Paris characteristic (see Photo)

I have a theory about this late 1920s mystery Selmer of mine, and I may be on the cusp of discovery.

Thank you!

(Measurements in thousandths of an inch or mm are fine!)