Clearly when looking at these watches, they bear no resemblance to the Speedmaster line at all.  These watches do not have Speedmaster written on them anywhere but the official name that also appears in the Omega Vintage Database is Speedmaster Classic (Heritage).  This is unusual, but it's possible that Omega in 1990 simply wanted to expand on the most valuable and successful brand in their line-up as many other brands have over the years.

The second name, "Maison Fondée en 1848" comes from the engraving on the case-back, but as this is the only marking on the watch it has come to be the unofficial name for these watches.  Now "Maison" means house, "Fondée" means founded (as opposed to fondue which is delicious melted Swiss cheese), and "en 1848" means in 1848, so "house founded in 1848" which is true for an Omega but a really weird name for a watch.

Information:

Pre-owned: Omega Speedmaster Classic Heritage 166.0285 / 3601.20 Solid 18k Gold

Reference:  166.0285 / 3601.20

Circa: 1990's

Dial: White

Bracelet: 18k Yellow Gold Bracelet and Omega Brown Leather Strap with 18k yellow gold buckle

Case: 35mm x 8.5mm thickness

Case Material: 18k Yellow Gold

Lug Width: 19mm

Movement: Omega 1108 (ETA 2982-A2 base) - Automatic - Serviced 2/1/24 - one year warranty

Functions: HMS, Date

Accessories: Watch Only

Crystal: Plexiglass

Bracelet size: 7.5”

Condition:

The unpolished case has minimal wear. Strap has no creasing and practically no wear. Dial hands, and crystal have no wear. Watch was serviced 2/1/24 and comes with a one year warranty on the movement.