Help dating an alecrical panel
I would appreciate it if someone would take a guess or give me any helpul insight as to what the best way to guesstimate when this panel was installed or upgraded. Its in florida, 1961 home, eq loadcenter brand(I.T.E), 150 amp fuse block for the main, and the rest of the breakers are in good looking shape, NO single strand aluminum, Aluminum sevice entry conductors, one aluminum 240 breaker.
When did they start, stop using fuses for the main, specially 150 amp main fuse that I have never run into before, nothing over 100 before. Is the combination of main fuse with breakers any clue, is there anything to point me in the right direction of decade, 1961 had 150 amps main??
here is the pic
Thanks you to anyone that can help. dating panels is always a pain for me unless obvious clues are there