Reference:6150: Difference between revisions
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== Production outline == | == Production outline == | ||
'''Production dates are contested.''' Hodinkee dates production to 1952–1953 ( | '''Production dates are contested.''' Hodinkee dates production to 1952–1953 (), making this a short-lived reference. The Chevalier Field Manual gives a much wider range of 1952–1959 (). This is a major discrepancy — a 1-year production window versus a 7-year run. If Chevalier is correct, the 6150 overlaps extensively with the 6350 and potentially with the 6610. | ||
Total production volume is unknown under either timeline. The Chevalier Field Manual notes that the 6150 evolved into the 6298/6350 in 1953, which could mean the 6150 continued in production alongside its successors rather than being replaced cleanly. | Total production volume is unknown under either timeline. The Chevalier Field Manual notes that the 6150 evolved into the 6298/6350 in 1953, which could mean the 6150 continued in production alongside its successors rather than being replaced cleanly. | ||
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== Movement notes == | == Movement notes == | ||
The 6150 runs calibre A296, the same base movement that appears in the 6350. The critical difference is certification: the A296 in the 6150 is '''not''' COSC-certified, making the 6150 a non-chronometer watch. This is the single clearest technical distinction between the 6150 and the 6350. It is also the key distinguishing feature from the 6610, which uses calibre 1030 ( | The 6150 runs calibre A296, the same base movement that appears in the 6350. The critical difference is certification: the A296 in the 6150 is '''not''' COSC-certified, making the 6150 a non-chronometer watch. This is the single clearest technical distinction between the 6150 and the 6350. It is also the key distinguishing feature from the 6610, which uses calibre 1030 (). | ||
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* 36mm stainless steel Oyster case | * 36mm stainless steel Oyster case | ||
* Smooth bezel | * Smooth bezel | ||
* “Bubble back” style case profile ( | * “Bubble back” style case profile () | ||
* 50m water resistance rating | * 50m water resistance rating | ||
* Acrylic crystal | * Acrylic crystal | ||
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== Sources == | == Sources == | ||
== Sources == | == Sources == | ||