Hermann Thunig and Alfred Helwig. A unique model of Helwig's "Flying Tourbillon" employing the pivoted detent escapement of Moritz Grossmann.
Constructed at the Deutsche Uhrmacherschule, Glashütte, 1927
The silvered carriage with Helwig's characteristic "U" shaped upper frame including ruby end stone, unusual pivoted detent escapement with jeweled pallets, overcoiled spring, uncut bimetallic chronometer balance with cylindrical weights and timing screws, going barrel wound through the turned wooden base, under glass dome, accompanied by a later edition of Helwig's treatise, Feinstellung der Uhren (Fine Adjustment of Watches). 11cm diam. of base plate