Marzocchi Marathon SL Bomber 2004 suspension fork, one of Marzocchi's top XC/Marathon forks from the era. 105mm travel, ECC5 external rebound adjustment, 100mm QR, and mounts for both rim and disc brakes.

The ECC5 system has 5 rebound settings, including a lockout position for steep climbs.

Specs:
Marzocchi Marathon SL Bomber
2004
105mm travel
ECC5 damping
1-1/8" straight steerer
200mm steerer
100mm QR
Rim + disc brake mounts
26"

Fork is slightly stiff through the travel and has unknown service history, so I'd recommend a service. Otherwise a really cool, high-end period Marzocchi fork.