Actually, you probably have the rifle version of the model 1902 'Dickson' sight.
The curved elevation 'ramp', on the rifle-base, is taller than the carbine 1902 base.
The carbine base is also marked with a "C", usually on the right-side. (Only about 1,000 carbine sights, with the 1902 style base, were made).
The top leaf assemblies are identical for 1902 rifle and carbine sights.
There are variations in the locking-knobs and the 1902 eye-pieces: (plain single-notch, single-notch with swing-up 'peep', and 1898 three-notch eye-pieces altered at Springfield and used to make 1902 sights).
Attached photo shows 1902 carbine and rifle bases:
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