Asking: White Gold Oyster Links with Different Screw (is it Gold or SS?)

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I got this 2 extra links for my 118239 Day Date oyster bracelet.
From the picture,
The upper side is the correct one and same type of link/screw with mine existing bracelet.
The bottom link totally different.
Can someone please help to confirm the correct bracelet/type of the bottom side link. It has silicon/plastic tube and smaller screw. Is it Gold or SS ?
It looks like gold when I check through loupe.
Thanks a bunch