Hello Stuart,
The car would I guess have been owned by one of the Jordan brothers who were still involved with the company in 1976 when I started there as an apprentice toolmaker, They used to park a large expensive car outside when I worked their but I thought it was an Elvis but my memory could be failing me as the photograph above does look like the car I remember ?. Tell me does this Bristol have a panel on the side of the car that the spare wheel was stored behind because I seem to remember that the car parked outside in the late 70's did. If it does and it is the same car parked outside in the late 1970's then I think it belonged to Clive Jordan,
The building was directly opposite Concentric Pumps at the botttom of a dead end called Priory Road and is still their today and I think it is the building you are looking at on Google.
Peerless Stampings made brass and aluminium stampings and also machined them to very accurate tolerances and these were used in gas fittings, gas turn off valves etc, the releases valve on top of fire extinguishers, Calor Gas cylinders and also simple decorative brass items such as three brass monkeys "see no evil, hear no evil and speak no evil" but one of their biggest products were brass sink wastes which we possibly all had at least one of in our homes. These were made by the hundreds of thousands when I was there. Another big product for them were the nice polished brass electric switch covers seen in pubs, hotels etc and these were made for M K Electrical in London.
If you go onto "Google Maps" and type Priory Road, Aston, Birmingham into the search bar it will take you to the map of Priory Road and if you then grab the little man and drag him to the end of the cul de sac of Priory Road the street view photograph will show you the Peerless Stampings building as it looks today, a blue and white Cash and Carry (JB Foods) and if you manover the picture and look at the office entrance door that is where your car used to be parked every week day.
Hope this helps, I worked their from 1976 to 1979 as an apprentice and then went back in 1990 as the Quality Manager but only stayed for 12 months.
They were bought out in the late 1980's by the Newman Tonks group to make brass and aluminium stampings for thier architectutal hardware products.