. . . congrats on owning a rare and desirable Constellation. Arrowhead markers, too . . . don't believe I've seen another exactly like it.
White gold cases are extremely rare but do exist in both 14 kt and 18 kt for a few Connie references including 2852. There aren't many Omegas left on my wish list, but a black dial Connie cased in white is near the top.
Here's a pic of a white gold 2852 from the late '50s . . .

. . . courtesy Erich [log-in: mac_omega].