Original will probably be IN4001 or IN4004 but IN4007
Just to be a pedantic twit, because I can, the diode designation is actually
1N400x.
The 1 signifies the number of junctions in the semiconductor device, one for a diode. Transistors, which have two junctions, when following this naming scheme are 2Ns.
That said, I'll get of the soap box and crawl back into my hole
