Vintage 1994 BART Bay Area Rapid Transit Highest MTBSD Concord Shop 1504 Pin

This vintage 1994 pin features the BART Bay Area Rapid Transit logo prominently, along with the designation ‘Highest MTBSD’ and the shop number ‘1504.’ I believe the pin serves as a piece of memorabilia celebrating operational excellence within the transit system, possibly related to having a high mean time between stoppages.

Condition: Used with marks, scuffs, etc. Please review all photos for exact condition of item and size.