石上清泉 发表于 2012-11-17 09:42 
谁有多一些汗748机芯的资料？
Hamilton Grade 748，8/0 size（约23.7mm），生产时间为1948-1954。
关于Grade 730系列有下面一段话：
The 730, 735, 736, 747, and 748 grades are also a 'family' with many interchangeable parts among them. The 747 is a conventional windup movement with 17 jewels, sub-seconds at 6, and no shockproofing. The 730 was identical except for Incablock shockproofing, making it a little bit more durable. Grades 735, 736, and 748 used the same basic pillar plate but were designed for a center sweep second hand, and had 18 jewels. The 748 lacks shockproofing, 735 and 736 have Incablock shockproofing.
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发表于 2012-11-16 23:21
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发表于 2012-11-17 00:13
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