My latest find. What's her name fellows. 3 diamonds at 9, 12, and 3:00. Could she be a Beau. I found her at the Flea Market for a whopping $5. with a cracked yellow crystal, sub-second hand floating around detached, crown wouldn't budge and dial was water stained. But she's looking good and running strong.
Tentative Launcelot from me.
1955 ad below. Click for full ad.

Looks like there were at least 4 Launcelot variations (if not variants, as 30175 appears twice w/ $5 price difference. List from 1955

1954 list below shows models by number by "diamond dial" version, so both below have diamond dial and are in Yellow gold.

With both lists, the model # 30177 not shown in red ad (one of the C variants) is Yellow gold case w/ diamond dial.
In reply to Tentative Launcelot from by William Smith
In reply to Unknown from me, jewel count by OldTicker
In reply to Unknown from me, jewel count by OldTicker
In reply to Yea I missed the jewel count by William Smith