Found at Fentonfire.com:

1987 Spartan Darley Snorkel 55′ 1500/0 (Q0926)

Really nice 1987 Spartan Snorkel for sale!
6 cylinder Cummins
Allison automatic
Front tires 315/80R22.5 in good condition, rear tires 12R22.5 in good condition
10-man Spartan cab
(2) SCBA seats
No booster tank
Q2 siren
Electronic siren
55-ft Snorkel (will have new certification) Excellent condition,

679 Engine Hours

55' Snorkel for sale

1987 Spartan Darley 55′ Snorkel. Fenton Fire photo

55' Snorkel for sale

1987 Spartan Darley 55′ Snorkel. Fenton Fire photo

55' Snorkel for sale

1987 Spartan Darley 55′ Snorkel. Fenton Fire photo

55' Snorkel for sale

1987 Spartan Darley 55′ Snorkel. Fenton Fire photo

55' Snorkel for sale

1987 Spartan Darley 55′ Snorkel. Fenton Fire photo

thanks Al