Where's the main disconnect?

I inspected a house with the pushmatic panel yesterday. I assumed it was 100 amp panel, but when I went back to look at the photos again, I could not find a disconnect switch. Am I missing something here? And do you see anything else in the photo that I should call out other than a couple obvious double taps?

Looks like a split bus panel.

Pushmatic split bus. The 5 th breaker that says Main Lighting shuts off all breakers below. Making it 5 throws which is allowed. I cant read the label diagram on the back of the panel, but if you can , take a look. Probably tell ya more info about this panel. Pushmatics are older and breakers harder to find and dont have GFCI or AFCI breakers, but have proven to be a reputable set up

That explains it perfectly. Thanks guys