A Troon triumph by a team made up mainly of amateurs saw the East Alliance pick up the Uniroyal Trophy.
The visitors beat their West counterparts 17-7 to claim victory in an annual match that gores back to 1947.
East won the morning foursomes, which were played over the Darley course, 5.5-2.5 and then triumphed in the singles 11.5-4.5 on the neighbouring Lochgreen layout.
Bathgate’s Louis Gaughan, the new East Alliance champion, led the way in the afternoon session by recording a 3&2 victory over John Henry.
Double winners included Duddingston duo James Dick and George Wither, as well as Bathgate amateur Simon Lockhart.
• Hall claims bronze
Kilspindie’s Aaron Hall fared best among the Lothians hopefuls in the separate Scottish Boys and Girls Open Championships.
Hall claimed the bronze medal in the boys’ event at Montrose, carding rounds of 74-73-73 to finish just a shot behind Germany’s Patrick Schmuecking.
Jack Gallacher, Stephen’s son, made the cut in that after a fine 70 while Broomieknowe’s Hannah Darling finished joint-13th behind Welsh winner Ffion Tynan in the girls’ event at Monifieth Links.
• Tantallon and Craigielaw survive
Tantallon pulled off a great escape and Craigielaw won a play-off to stay in the top flight in next season’s East Lothian Winter League.
Four consecutive wins, the last one away to Musselburgh, saved Tantallon’s skin as they finished in a four-way tie on 12 points, surviving on that mark along with Musselburgh.
That left Craigielaw and North Berwick facing a play-off at Gullane to decide who would be dropping down along with Haddington, and Craigielaw won that one 3.5-1.5.