. . . seems to have a following on TP/PPro, and your last photo brings a new dimension to 'stacking' that seems to be in vogue on the Rolex and Blancpain forums ;-). Re testing in three temperatures: the current G O Senator Chronometer is issued with a chronometer certificate which has to be performed in three temperatures to meet the DIN standard, and I believe many Grand Seikos are also adjusted in three temperatures as well . . . cordially, Art