Help me ID my PS Pump?

O-Ring offers a more simple seal solution that a flare. And it is serviceable with a simple o-ring changeout. if the flare got buggered or cross threaded, the thing would have to come out and get serviced on a bench. PS pumps can be 800 psi, plenty of pressure to find a weep point in a compression type seal. No one likes a leak ask a Jag or Harley Davidson owner.....