The more I look at this, the more I think this is a basement that someone decided to finish and put the brickwork out and infront of that panel and stuff... It'd be kinda rare for a utility to give a meter location in your living room
(at least here it would be
there appears not to be any type of main OCPD in/on that FPE panel, so the "six throws or less" rule is right out the window.. dangling unsupported NM's, The SER doesnt seem to have any support on it either, but I can't tell for sure....
Maybe bricking around all this mess wasn't such a bad idea after all.... as long as it vents to the outside, it may likely keep this house standing
PS Any idea what the 2P Square D QO is for in the top of the opening? It's showing tripped.