Hello All
New here, but not new to the trade. Started in high school and turned out in 1973, started my own bus. in 1990.

As for the pic. I didn't measure but I slid in side ways and stood in front of the panel and I couldn't raise my arms and get a screw driver in front of me. Way to close to work on. I'm about 14" from my back to the front of my chest (I crawled between beams in an attic space and measured once ,very min. crawl for me I'm 6'2" and 260#) so it is maybe 18" from wall to front of panel.

The house was built in the '40s