It's looks to be 20+ years old too, just like our old stuff. Ours was all in perfect working order too, just not big enough to meet the new demand of what we added in the past year at this facility.
I was surprised to see both the old and new units came with circulating block heaters. Standard practice up north but down here in the South, they don't even bother with heat trace.
Even if you don't see temps low enough to justify them, keeping the block up to temp on a unit that will be required to start and operate at full load within seconds is kinda important.