Here is a diff against the MonitorsDB file from
Xconfigurator-4.3.3-1 (latest I found on rawhide).

It cleans up the list of IBM monitors a bit by removing some
duplicate entries, and adds a few new ones.

505a506,507
> IBM; IBM 6331 E54; 0; 30.0-69.0; 50.0-120.0
> IBM; IBM 6332 E74; 0; 30.0-69.0; 50.0-120.0
514d515
< IBM; IBM 6547 G72 & G74; IBM1993; 30.0-69.0; 50.0-120.0
516a518
> IBM; IBM 6548 G76; 0; 30.0-86.0; 50.0-160.0
518c520,522
< IBM; IBM 6549 G94; IBM1995; 30.0-95.0; 50.0-160.0
---
> IBM; IBM 6550 P76; 0; 30.0-94.0; 48.0-120.0
> IBM; IBM 6551 P96; 0; 30.0-107.0; 48.0-120.0
> IBM; IBM 6552 P260; 0; 30.0-121.0; 50.0-160.0
534,537d537
< IBM; IBM 9514-B TFT Panel; 0; 31.0-38.0; 60.0-75.0
< IBM; IBM 9514-B TFT Panel; 0; 34.0-50.0; 55.0-75.0
< IBM; IBM 9514-B TFT Panel; 0; 48.0-65.0; 60.0-75.0
< IBM; IBM 9514-B TFT Panel; IBM252A; 48.0-65.0; 60.0-75.0