Progress is fine, but it's gone on for too long.: P A Rocket

Very similar to the Stafford Liner train pull toys, these toys must be another product of the the same company. The stampings for the locomotives are a bit more detailed than the Stafford Liners, have a different pilot and added smokestack detail. The the only car I've seen, a caboose, is also less crude than the Stafford Liner cars.
No other info on these old stamped steel toys.