Alternator is charging at 14.5-15V, this is (usually) too high, but we have no choice there. I needed a charger for when the battery was stored for a few months, so it needs to be charged BEFORE running an alternator. Also, to equalize it from time to time if necessary.
50 years would've been a good lifespan for a cheap charger, though 50 years ago it wasn't exactly cheap in terms of both quality and price. Times changed since then. Another thing is - if the charger "always worked", this doesn't tell much, other than it was outputting some amps and volts. Like I wrote (and in more details a month ago in another thread on this subject), amps and volts in unregulated chargers are often not in the correct range.