I guess I can’t type either, “accepable”? Can you clarify or point me to materials to be able to always judge these? I read that the AL buss with CU breaker clamps was part of the problem. Some sylvania have it some don’t. Some sylvania have the mult-colored magna-trip, some don’t.
There are several variations, but the “cross-over” is simply a Zinsco panel with a Sylvania sticker - no design change whatsoever.
The thing to look for is the blade type bus bars. They may be AL or CU (copper). The earliest of Zinsco did not have bus bars, but the breakers are a dead giveaway. The last photo is the feed-thru type Zinsco breakers, prior to the copper bus bars.
“Magnatrip” is from their original design and is simply a reference to their “new” technology from the years where fuses were the norm. As breakers became more popular, they stopped branding “Magnatrip.”
Did you note the green branch circuit conductors connected to the two breakers on your report?
Also, another defect item is when you see any circuit conductor that is “nicked” at the termination. That conductor can break when handled during any replacement or maintenance task.
Green or green with yello stripes or bare conductors are used for EGC and Bonding jumpers.
"210.5 Identification for Branch Circuits
(B) Equipment Grounding Conductor The equipment grounding conductor shall be identified in accordance with 250.119.
250.119 Identification of Equipment Grounding Conductors
Unless required elsewhere in this Code, equipment grounding conductors shall be permitted to be bare, covered, or insulated. Individually covered or insulated equipment grounding conductors shall have a continuous outer finish that is either green or green with one or more yellow stripes except as permitted in this section. Conductors with insulation or individual covering that is green, green with one or more yellow stripes, or otherwise identified as permitted by this section shall not be used for ungrounded or grounded circuit conductors."