Accepted elevation-bay identity
B02 REJECTED; B09 DIAGNOSTIC ONLYThe oriented W-6 plan runs south-to-north opposite the B01–B10 elevation register; no physical opening is placed.
Drawing notation: 4/11; ROOM 421
Page-right Broadway mark; source pixel neighborhood [2855,795,2904,850]. It lies nearer page-top/Madison than page-bottom/Main.
Existing B02 visible elevation envelope, master pixels about x1199–1298/y1311–1437; opening mark was not independently decoded from this elevation.
Existing B09 visible envelope, master pixels x2763–2864/y1318–1444; metric alternative only, not a confirmed key match.