首先，看到這面盤，內行的就知道了^^
最近因為已經不知道要玩啥勞，前面先搞了一只600m 8L35，後來又手癢買了個初代老吞拿
在此偷懶一下，轉貼國外資料
There are actually 3 varients with-in the 6159 shrouded diver line covering two model numbers, that's (2) 6159-7010 dial variants & (1) 6159-7019 model variant.
1st. 6159-7010, Dial font reads: "600 No-Meter with Suwa" symbol.
2nd. 6159-7010, Dial font reads: "600m with Suwa" symbol.
3rd. 6159-7019, Dial font reads: "600m with Suwa" symbol.
The 6159-7010 series are the earlier type model & dial variants, and the 6159-7019 being the later & final model.
~ The 6159-7010 600 non-meter Suwa is thought to be the earliest 1st production type, then the dial font changed later in that year to include the Meter "M" symbol, and then came the later 6159-7019 600m Suwa.
There have been question's about where the 1st non-meter dial variant was made:
Was the 1st dial variant made at the Seiko "Daini" production facility, or was it possibly also made at the Seiko "Suwa" Facility?
That question I have some of my own thoughts on & while I don't know the exact correct answer, I'll leave that up to the professionals to discuss & opine upon.
Some stats of the Original 1975 6159 Tuna's:
Caliber 6159B hi-beat 36,000bph
25j auto,
Hack,
hardlex crystal,
weight: 114+ grams,
height 16.5mm,
width 51mm & 52.4mm with crown,
length 52.3mm,
lug width 22mm,
Price: 89,000 Yen
以前我也買過這東西，但當時的我還沒有維修能力，很多問題也無法自己處理
現在回頭再來完，機況對我已經不是問題了XD
很幸運的，這只機芯很美 清洗後很亮白
（未完待續）
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