Dr No[Moderator Omega - Wristscan]
37672
Oh, there were solid gold Speedies prior to the '90s . . .
. . . but limited in number. A series was produced to celebrate the moon landing; they were offered to President Nixon and Vice President Agnew, but both men declined. Astronauts received them, though. The reference number should be BA145.022 . . . produced only in yellow gold, and with red bezels.

[photo credit: Dr No]
Rarer still would be the solid yellow gold Mk II references [BA145.014] . . .

. . . of which fewer than ten were made.
Art