The sign accompanying the suit. It reads
Backup Space Suit for Skylab
This space suit was the backup suit for Captain Alan Bean on the Skylab 3
mission. It includes the torso limb assembly and the 3 layer intra-vehicular
protective garment, since he was not to go on an EVA.
The sign has multiple problems, including that this is Alan Bean's backup
Skylab suit and that he didn't perform an EVA. However, this suit looks like
an A7L Command Module Pilot
suit; the Skylab suit is based on the A7LB suit, and has
a different pattern of chest connectors. Bean did perform
an EVA on his Skylab flight.
Bean was the backup commander for the Apollo-Soyuz Test Project, and the
suits worn on the ASTP mission were based
on the A7L CMP suit, so it seems more likely that this suit is from that