The 1033 does have a breaker, and it is kinda adjustable so you should test it.
Someone may have adjusted it to not trip at all. (It does have a thick heavy threadlock glue originally, so adjusted will have crumbly locktite misaligned,o have been cleaned off well. )
Test it.. make a direct short with a short, heavy wire or caveman style with a screwdriver for 4-12 seconds. (I like seeing tripping at 4-5 seconds)
These breakers corrode sometimes (no cover) a breaker with a cover or plastic leaf holder, no adjustment ,is really for a 1044 .... acceptable.
They do get hot enough under load to wake you right up;resting the hand wrong 😉