Maker, Alle Reintje Douma, Amsterdam, Netherlands, c. 1967. Movement net
6.5" diameter", 4.25" h, overall with base 5.5"h x
8.5"diameter. Earnshaw detent tourbillon escapement model with clockwork
readout. Eight day duration.
This escapement model is very large, and not coincidentally heavy, by
normal standards. It is unusual in that it combines a bit of a clock within
the escapement model format in that it has a clock of an eight day duration
with a dial.