I often go to the mountains and need it for exams, so in recent years I’ve mostly been using radio-controlled watches. However, the flagship watch in my collection at home is the Omega Speedmaster Broad Arrow 1957, which is the second from the left in the photo.
(Unfortunately, I wasn’t able to capture the peeling well enough to show it in photos.) I found it on a Tokyo shop’s website and went to see the actual watch in person. Indeed, about one-third of the sapphire glass area had peeling, and depending on the angle, it was quite annoying. However, since it was only bothersome at certain angles and didn’t usually bother me, I decided it was acceptable and went ahead with the purchase. After buying it, I thought that since it might get scratched after long use, I could just replace the glass altogether at that time.
Eight years have passed since then. I’ve maintained the watch with strap repairs and overhauls, but the peeling on the coating seems to have grown, and it’s become increasingly bothersome. When I asked how much it would cost to replace the sapphire glass during the last overhaul, the answer was a staggering 130,000 yen!
It’s common on the internet to see articles mentioning that anti-reflective coatings on Omega and Breitling crystals can peel off. Omega watches have coating on both sides of the glass, but it’s not always necessary. In fact, brands like Rolex don’t apply coatings at all (though recently some models have started to).
Omega Mark 40 anti-reflective coating restoration Pros and cons of crystal coatings About removing anti-reflective coatings
This time, I asked Tamtime, who did the overhaul on my Mahara watch, to remove the coating. https://tamtime.net/ The coating was very tough and couldn’t be removed by polishing alone, so they sent it to a glass specialist factory where the coating was removed chemically. Though they originally said it would take two weeks, it ended up taking over a month. But when the watch arrived, it looked clean and I’m satisfied. The cost was about 8,000 yen.
It came back in a beautiful presentation box. At first glance, you wouldn’t notice that the coating had been removed.
*************** …と書いたのですが、2~3日使用してみると、思いのほかコーティングを剥がす前と比べて、印章が異なることに気づきました。まず、室内では蛍光灯などが反射して想像していた以上に針が見ずらいです。それに加えて、光の透過率が下がったことによるのか、文字盤そのものが、白の鮮やかさが減ってぼんやりした感じになってしまいました。全体的にクリーム色っぽく見えるんですよね。そうなってくると不思議なもので、時計の文字盤全体の輪郭もぼんやりとした風に感じます。 …That’s what I wrote initially, but after using the watch for two or three days, I noticed some unexpected differences compared to before the coating was removed. First, indoors under fluorescent lighting and such, the hands are more difficult to see than I had imagined due to increased reflections. Additionally, perhaps because the light transmission has decreased, the dial itself seems less vibrant—the white looks duller and somewhat muted. Overall, it appears more cream-colored. Strangely enough, once this happens, even the entire outline of the dial looks somewhat blurred or softened.
この写真はコーティングを剥がす前ですが、斜めから見たときにこのようなクリアさがなくなってしまった感じです。 This photo was taken before the coating was removed, and the clear sharpness you see here from an angle has now disappeared.
思うに、ガラスの側面の部分の乱反射が、印象が変わった大きな原因ではなかろうかと。
Tamtimeさんはよい仕事をしてくれたので、文句は全くないのですが、時計の印象が予想以上に変わってしまったのが残念です。逆に言えば、それだけ無反射コーティングの効能が大きかったということなんでしょうね I think a major reason for the changed impression is the increased glare caused by light reflecting off the edges of the glass. Tamtime did a great job, so I have no complaints at all. It’s just a bit disappointing that the watch’s overall look changed more than I expected. On the other hand, that probably just shows how effective the anti-reflective coating was.
さらに追記:しばらく使っていたら、コーティングのない状態にもすっかり慣れました。もとからこういうものだと思えば何の不満もありません。何より見た目の見苦しさがなくなったので、結果的に剥がしてもらってよかったと思います。 Additional note: After using it for a while, I’ve completely gotten used to the uncoated glass. Once you accept it as normal, there’s really no issue. Above all, the watch looks cleaner without the coating, so in the end, I’m glad I had it removed.