FDNY Seagrave (Truck 10 if they are wise) definitly. Look at the outline closely. Starting from the cab back, extended front bumper, cab to light bars are angled, captains side spot light, cab air conditioners, ladder cradle, mud flaps behind the front wheels, structural section at center bottom of the ladder, dual axle, ladder tip form, rounded rear side grap rails on the ladder platform, under body light just aft of cab, steps outline at the rear, etc.

I would put money on an FDNY Seagrave rear mount if the picture is of the rig they are modeling. They may be just using that image and doing something totally different.