Hello OF,

I found different explanations concerning the pin holes which can be observed on the dials of the sm300s. The most reliable in my opinion are:

1) the dial was held in these points during the application of the lume;
2) the brass dial actually has holes in it at the 12 and 6 hour markers and the fresh lume could sink into these holes leaving the 'pin hole'.

So I ask to the seamaster 300 experts what is the real explanation?

 

Back of a 14755 caliber 552 SM300 Dial. No holes that I can see.

 

And what about refs. 165.024 and 166.024?

 

Yes, it would have been more helpful if I posted a pic of the correct dial

 

Ha, holes spotted
https://omegaforums.net/threads/sm300-166-024-tritium-dial.42143/

 

Great! I will try to spot other examples!

 

I've seen this repeated for years, but to me it has never made sense. To have the dial resting on these points during the application of lume, the dial would be upside-down, which I think would make applying lume a tad difficult. If it was rested on these points after applying lume, that doesn't make much sense either - there's no need to turn a dial upside-down during of after the lume process.

 

Learn something new on here everyday.

 

So do you endorse explanation number 2?

 

I would imagine the lume material would be too thick to leave such a small hole. Was the dial held with a “pinch” device that made contact on both sides of the dial?

 

I have no opinion on #2, only saying that #1 has never made sense to me...

It's not something I have spent a lot of time thinking about honestly.

 

Did someone say pinholes?

 

I've been told the dials are made by Stern anybody know what the #s mean?

 

The second number is the calibre family the dial fits.