Help identify my Converter

So, when I bought my project it came with a lot of parts and goodies. So far everything has been as expected. Good stuff. I'm just starting to learn more about all those things that happen behind the motor. I'm not well versed on transmissions, converters and rear ends, etc. I'm trying to learn everything possible about what I have and right now its my converter that I'm looking at.
I don't know the manufacturer, but was told it was a 4,000 stall. It has a few sets of markings on it. The letter P above another P. Also, the numbers 1434 and 3800. Other converters I have seen advertise 2,000-2,200 or 3,000-3,200 etc. Does the 3800 marking on mine indicate 3,800 stall or 3,800-4,000? Maybe some one can school me on this. There are 122 teeth and overall width is 12", but the dome part is more like 10 1/2". So, you would call it a 10 1/2" converter not a 12", right? I could list all my car specs, but right now for the sake of these questions only, I'm not concerned how it will perform with the car. I've been over that with the builder. It's going in the car. At least to start with.
Can you tell the manufacturer just by looking at it?
Any info is helpful?
Thanks,