longines blue jewels

Dr. Jon

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I do not know details but to my knowledge the first watch to feature deep blue jewels was teh US made Edward Howard, a prestige watch made in the 1920's as part of a US makers competition to make the most expensive simple watch.

I have seen Ed Koehn and PAtek Philippe watches that also used these but until now I have not seen ine by Longines.

The difference betgween blue and clear and red is small "Dopants" in the aluminum oxide and these make no functional difference but they do add a lot of perceived value.
 
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novicetimekeeper

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There is a watch in the Royal collection with blue sapphire jewels, it was a gift from Victoria to Prince Albert
 
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wakitisyo

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Since the case is stamped with "SKS", which stands for "Seikosha", I believe that this Longines imported only the movement and cased it in Japan.

I feel that I see pocket watches with blue jewels more often in Japan than on ebay, for example.

ロンジン 懐中時計 ブルーサファイア ダイヤモンド受石
ユリス・ナルダン 懐中 ブルーサファイア
INTERNATIONAL WATCH CO. 懐中時計 - スイス製
本日の1個!(ミドー青石懐中、パワーウォッチの補足) - 古時計と小物の雑貨屋 モキ+(モキタス) 富岡八幡宮骨董市に出店中!!

This leads me to speculate that the demand for blue jewels was very high in the Japanese market at that time.
 

eri231

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Since the case is stamped with "SKS", which stands for "Seikosha", I believe that this Longines imported only the movement and cased it in Japan.

I feel that I see pocket watches with blue jewels more often in Japan than on ebay, for example.

ロンジン 懐中時計 ブルーサファイア ダイヤモンド受石
ユリス・ナルダン 懐中 ブルーサファイア
INTERNATIONAL WATCH CO. 懐中時計 - スイス製
本日の1個!(ミドー青石懐中、パワーウォッチの補足) - 古時計と小物の雑貨屋 モキ+(モキタス) 富岡八幡宮骨董市に出店中!!

This leads me to speculate that the demand for blue jewels was very high in the Japanese market at that time.
Congratulations, a spectacular Rockford.
regards enrico
 
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