Silde controls in the pull out drawer, or rotary controls?
Ah, the "MA" chassis XL-100s, with the non-repairable MAD modules, looks like you have 3 good ones -they were just as reliable as the repairable ones. RCA got it right with their thin-film modules, unlike Zenith.
My dream set is a similar-XL chassis in the danish modern console cabinet with 2 speakers - one on each end. I had one as a teenager, but sold it to a guy with 7 kids (oldest was my age) - his mother-in-law had the same exact model and he loved it, and wanted mine. Oddly, his kids didn't watch much TV.
VERY nice find
If you need any modules....lemme know