I have some information on the Mk II Signalling Telescope:
Introduced in June 1902 with LoC 11253: Magnification 15 and 30; field of view 85 and 55 minutes; aperture 2 inches; focal length 22 inches; length closed 11.5 inches; 3 draws; weight 3lb. 2 oz cost £2 in 1909.
No information at hand on the MkI but can say it was out of service and no longer in inventory by 1909.
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