Menu
Eterna
Omega
Tissot
Other Brands
Longines Ulta Chron 1972
PRIVATE COLLECTION
Not for Sale. Private Collection.
Beside Omega (see www.omega-fanatic.com) and Tissot, I also collect Longines.
All belonging to the group of the oldest watchmakers from Suisse.
Longines Ultra Chron 1972
18 ktr solid gold case : 8072 - 1
movement no: 52102871
calibre : 6651 25 jewels.
copy of Watch Talk Forum 2008 :
In 1972, Longines reduced the bph of their Ultra-Chron movements to 28,800 bph. Almost every part was identical to the 430 series except for a few modifications to some of the plates and the wheel train ratios. The 6641 had 25 jewels, and the otherwise identical 6642 had 17. The 6651 was either a 17 or 25 jewel movement but had the instant date mechanism added. The 6652 was 17 jewels, had the instant date mechanism, and was used in the Flagship HF (high frequency) series.
Beside Omega (see www.omega-fanatic.com) and Tissot, I also collect Longines.
All belonging to the group of the oldest watchmakers from Suisse.
Longines Ultra Chron 1972
18 ktr solid gold case : 8072 - 1
movement no: 52102871
calibre : 6651 25 jewels.
copy of Watch Talk Forum 2008 :
In 1972, Longines reduced the bph of their Ultra-Chron movements to 28,800 bph. Almost every part was identical to the 430 series except for a few modifications to some of the plates and the wheel train ratios. The 6641 had 25 jewels, and the otherwise identical 6642 had 17. The 6651 was either a 17 or 25 jewel movement but had the instant date mechanism added. The 6652 was 17 jewels, had the instant date mechanism, and was used in the Flagship HF (high frequency) series.
