Many thanks Geoff, that's a real beauty, and incredibly helpful information. It definitely appears to be a very similar movement, and interestingly also double-branded. And if the 155,xxx serial is from 1909, then my turn-of-the-century guess for 106,xxx may not be too far off.
Very fun to have these two well-preserved pieces together in the same thread, and to see both the similarities and variations.
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