Longines 343: what kind of sadist makes perfectly clear, almost flat cap jewels?

[ManSkirtBrew]

I've never seen one like this. It is almost completely invisible on my bench, and it's extremely difficult to tell top from bottom.

No real questions, just sharing.

[mikepilk]

@ManSkirtBrew don't go criticising my beloved Longines ! 

On my recently serviced 30L, the balance cap jewels were completely clear. I had one hell of a job finding them when I'd dropped them in to a pot of IPA. So I decided I needed to change them for the usual red colour. 

Are those cap jewels on the pallet?  It doesn't look round in the top pic.

[ManSkirtBrew]

11 minutes ago, mikepilk said:

Are those cap jewels on the pallet?  It doesn't look round in the top pic.

No, it's the lower balance jewel. It's a weird reflection that makes it look geometric.

In good news, though:

 

[nevenbekriev]

There is smaller circle surrounded by groove on the one side, this goes to the pivot. It is designed this way to prevent the oil from leaking.