Identifying cast-iron 2000 axle ratio?

["Watry, Andrew (LNG-SFR)" <Andrew.Watry@domain.elided>]

Anyone know if the gear ratio of a cast-iron 2000 (102 series) axle is
stamped into the housing somewhere?  I know I can turn it and count
revolutions, but that seems a little inexact, and the axle is pretty stiff.
If there's a stamping that sure would be easier. Any other sure-fire ways to
tell whether it came out of a Berlina, Sprint, or Spider, or perhaps early
2600 (it has drum brakes)?  Thanks

Andrew Watry
Berlina Register
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