Are 20mm Rolex (gen or generic) spring bars for a 1665 the same as 20mm spring bars for any other watch?

[Prsist]

Here is a pic of (as the author stated) gen Rolex 20mm spring bars (on the left). The second is of generic spring bars (on the right). Circled is the difference. Which ones will work and are preferred for the 1665?

[Martyd3]

On most cases, you will need to drill the lugs to use the gen style spring bars.

[JoeyB]

The genuine Rolex spring bars on the left are for the cases with the holes drilled through. The hole should be 1.3mm for the spring bar to fit.

[panerai153]

For your PT 1665 you need the springbars on the left, either genuine or generic. I believe your 1665 is supposed to have the lug holes drilled out from the factory.

[FxrAndy]

On the left, if you need a pair shoot me a PM