Golden Age Simulations are pretty well known now, for their classic aircraft, which often come with an appropriate scenery to go with them for FSX and P3D.
Their latest release covers the Pitcairn PA-5 Mailwing and Sport Mailwing. The original aircraft was built for the US Postal Service as, you might have guessed, a mail carrying aircraft. With the mail area removed and a dual-seat cockpit added, the Sport Mailwing was marketed for the developing General Aviation market of the time.
The aircraft comes with VC cockpits only featuring 3d modelled gauges, custom sound set, lots of detail and, to give you a sense of the period, a scenery for Pitcairn Field 1. See here for full details.