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Post by jimbo85281 on Oct 13, 2023 19:11:35 GMT -8
Does anyone know if this is a type 2 or type 3 320W10GN? It looks pretty low to me, with a very slight dome. Most likely original to the watch. Any input is appreciated!   |
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Fergus
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Post by Fergus on Oct 13, 2023 21:15:27 GMT -8
Unfortunately Seiko's OEM 320W10GN00 glasses all have the same number yet were produced in different heights.
You'll not know until it's removed and measured.
Spencer Klein's aftermarket version comes in 3 heights,
Type 1: 3.85mm
Type 2: 3.70mm
Type 3: 3.60mm
My original 6105-8000 glass is 3.45mm
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HiBeat
Global Moderator
SEIKO Iko Iko GDTRWS
Posts: 8,862 
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Post by HiBeat on Oct 17, 2023 3:43:33 GMT -8
Unfortunately Seiko's OEM 320W10GN00 glasses all have the same number yet were produced in different heights. You'll not know until it's removed and measured. Spencer Klein's aftermarket version comes in 3 heights, Type 1: 3.85mm Type 2: 3.70mm Type 3: 3.60mm My original 6105-8000 glass is 3.45mm it is most likely not the original but a good replacement quite probably OEM but not the one that left the factory.
Tom aka SeikoPsycho here sells a fantastic replacement. |
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Post by jimbo85281 on Oct 17, 2023 17:48:12 GMT -8
Unfortunately Seiko's OEM 320W10GN00 glasses all have the same number yet were produced in different heights. You'll not know until it's removed and measured. Spencer Klein's aftermarket version comes in 3 heights, Type 1: 3.85mm Type 2: 3.70mm Type 3: 3.60mm My original 6105-8000 glass is 3.45mm it is most likely not the original but a good replacement quite probably OEM but not the one that left the factory.
Tom aka SeikoPsycho here sells a fantastic replacement. Appreciate the info. Tom is great, I've bought many things from him. I'll get this out and measure it. I'm fairly certain it's an original type 2, but we'll see. |
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Post by jimbo85281 on Oct 24, 2023 8:04:13 GMT -8
I measured crystals in two different 6119 8300 rally divers and they both have the same 3.3mm height. Very unlikely they both had the same aftermarket crystal put in at some point. So this puts them lower than any of the 3 types that are being reproduced. Is it possible these were bespoke to Seiko 5 70m models only and not used on the 6105 etc?
I very confident that they're both original crystals based on the watches and how they present. For example, the crystal retaining ring in both was installed with the indent facing the top of the watch like Seiko did from the factory. Also, there are absolutely no marks under the bezel or retaining ring from tools. I've seen hundreds of vintage seikos and serviced probably 75 or 80 so I have a decent feel for an untouched watch.
Has anyone measured their original crystals from these watches? Mine are both early 1969.
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HiBeat
Global Moderator
SEIKO Iko Iko GDTRWS
Posts: 8,862
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Post by HiBeat on Oct 24, 2023 18:09:47 GMT -8
FWIW I had a few of the 6119-6020 'mini-Pogues' that carry the same crystal number and they clearly had a profile that was not what we normally see on the 6105-811X diver series.
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Post by jimbo85281 on Oct 25, 2023 7:42:33 GMT -8
FWIW I had a few of the 6119-6020 'mini-Pogues' that carry the same crystal number and they clearly had a profile that was not what we normally see on the 6105-811X diver series.
Appreciate the info. I feel like there was definitely a crystal put in the 6119 and others that was slightly different than the 6105 diver crystals. Just not sure if it's made at all these days. |
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Fergus
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Post by Fergus on Oct 25, 2023 8:07:27 GMT -8
We are finding out Seiko conceived at least two more 320W10GN00 sizes.
Just had a look through SK's web and he no longer states the crystal thicknesses.
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HiBeat
Global Moderator
SEIKO Iko Iko GDTRWS
Posts: 8,862
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Post by HiBeat on Oct 25, 2023 10:08:25 GMT -8
Tom aka SeikoPsycho here on this site is an expert and sells top quality repros. |
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Post by SeikoPsycho on Oct 25, 2023 17:22:00 GMT -8
I've posted this before but sometimes things get lost over time. Here are the 320W10GN types and measurements:
Type 1: Single dome, flat top measures 3.81mm to 3.89mm
Type 2: Double dome measures 3.76mm to 3.85mm
Type 3: Double dome measures 3.57mm to 3.70mm
Type 4: Double dome measures 3.48mm to 3.52mm
The most common type was the type 3 crystal.
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Post by SeikoPsycho on Oct 25, 2023 17:25:16 GMT -8
Tom aka SeikoPsycho here on this site is an expert and sells top quality repros. Thanks for your thoughts Jon.
I don't feel I'm an expert but I've been around the block a time or two when it comes to Seiko's.
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