is specified within the body of an incredibly detailed narrative as part of a long thread post on the HEQ forum. The article was originally provided by Bruce Reding (High End Quartz forum moderator) before the forum software crash last year. It was rescued from google cache last February by "Hedrick" and re-posted on that forum. "BigChrono" posted this link Effects of Tempreture Extremes and Magnetic Fields on Superquartz? to that complete thread on the Breitling forum on 12/21/2006. The article is lengthy but contains a wealth of interesting information. I have taken the liberty of extracting portions of the article containing references to Breitling B7X calibers and placed them here. The data serves to supplement rbt's "sticky" post listing Breitling caliber references by providing details on the SQ calibers. With thanks and appreciation to Bruce, Hedrick, BigChrono and rbt, here is the extracted data...


Caliber: ETA 251.232 (ETA Thermoline)

Technology: single 32 kHz crystal (digital count adjustment method with thermistor)

Annual accuracy: ±10 seconds

Rate adjustable?: yes, by the watchmaker during service

Watches that use this movement:


Breitling Aeromarine Colt Chronograph SQ (Breitling caliber B73)

Breitling Aeromarine Avenger M1 Chronograph SQ (Breitling caliber B73)

Breitling Professional Emergency Mission SQ (Breitling caliber B73)


Note: Breitling has designated all its thermocompensated watches as 'SuperQuartz' (SQ) since2002. For reasons that are unclear, Breitling specifies its SuperQuartz movements to 15 seconds per year, even though we have no evidence that they differ from the ETA Thermoline models which are specified to 10 seconds per year.

Sources of information: ETA sales literature, Breitling sales literature


Caliber: ETA 956.152 (ETA Thermoline)

Technology: single 32 kHz crystal (digital count adjustment method with thermistor)

Annual accuracy: ±10 seconds

Rate adjustable?: yes, by the watchmaker during service

Watches that use this movement:


Breitling Windrider Callistino (Breitling caliber B72)


See note for ETA caliber 251.232.

Sources of information: ETA sales literature, Breitling sales literature


Caliber: ETA 955.652 (ETA Thermoline)

Technology: single 32 kHz crystal (digital count adjustment method with thermistor)

Annual accuracy: ±10 seconds

Rate adjustable?: yes, by the watchmaker during service

Watches that use this movement:


Breitling Aeromarine Colt Quartz SQ (Breitling caliber B74)


See note for ETA caliber 251.232.

Sources of information: ETA sales literature, Breitling sales literature


Caliber: ETA 956.652 (ETA Thermoline)

Technology: single 32 kHz crystal (digital count adjustment method with thermistor)

Annual accuracy: ±10 seconds

Rate adjustable?: yes, by the watchmaker during service

Watches that use this movement:


Breitling Aeromarine Colt Oceane SQ (Breitling claiber B77)


See note for ETA caliber 251.232.

Sources of information: ETA sales literature, Breitling sales literature


Caliber: ETA 955.452 (ETA Thermoline)

Technology: single 32 kHz crystal (digital count adjustment method with thermistor)

Annual accuracy: ±10 seconds

Rate adjustable?: yes, by the watchmaker during service

Watches that use this movement:


none known


Source of information: ETA sales literature


Caliber ETA 988.352 (ETA Thermoline)

Technology: single 32 kHz crystal (digital count adjustment method with thermistor)

Annual accuracy: ±10 seconds

Rate adjustable?: yes, by the watchmaker during service

Watches that use this movement:


Breitling Professional Emergency SQ (Breitling caliber B76)

Breitling Professional Aerospace SQ (Breitling caliber B75)


See note for ETA caliber 251.232.

Sources of information: ETA sales literature, Breitling sales literature


Caliber ETA E20.341 (ETA Thermoline)

Technology: single 32 kHz crystal (digital count adjustment method with thermistor)

Annual accuracy: ±10 seconds

Rate adjustable?: yes, by the watchmaker during service

Watches that use this movement:


Breitling Professional B1 SQ (Breitling caliber B78)


See note for ETA caliber 251.232.

Sources of information: ETA sales literature, Breitling sales literature