Stadia Match Output

Number:1

Maker:Blundell Harling PG54
PHOTO

Length: 25 cm

Gauge Marks: π

Scales Front: A B CI = ST C D = S TA TB

Scales Back: 6 special scales

Info: BHL Photographic Interpreters Slide Rule Mk II - Military Ref. 7520-99-537-0544
Tina Condon Collection.
I'm not sure that this can be classified as a Stadia Rule!