Two links have your answer....

Jun 18, 2007,04:58 AM
 

This is for the 97X family called autotractor and this for the 87X family with 8 days manual winding
The two families has completely different caracteristics and cover 2 differents targets...
They are opposite for many technical aspects, It depends on what you need!

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Calibre 977...

 
 By: mikesprang : June 16th, 2007-13:57
The Reverso Squadra Hometime is my favorite timepiece from the Manufacturer JLC. I am trying to get some answers to a few of my questions about it's movement, the Cal. 977. I have done searches on it to try to find this information, but that led to even m... 

The Squadra Hometime is a squared version of the Autotractor...

 
 By: watchme : June 18th, 2007-18:26
movement, first released in 2004. It is the MOST robust caliber ever developed by JLC (with over 1,000 calibers to their credit since 1833). It was designed to allow full integration of other complications. The Master Hometime and recently discontinued (s...