(Audio) products with exceptionally long production runs

I've been having a hunt to find out if any cartridges have had a longer unbroken production run unchanged than the ortofon SPU and so far failed. The EMT TSD15 didn't start until 1965 so ortofon with 1958 to present is currently in the lead there.
 
Watts Dust Bug?
The original 60s/70s Watts Dust Bug is long out of production, but the idea lives on in modern record cleaning arms.
 

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So, if its predecessors count, how about the Fostex FE103?

I thought the 103 was its own predecessor? The current model seems to be the 103En, with banana, a hint more stiffness, cancellation magnet, and datasheet 7X bigger. (And much higher dollar price than I paid in 1973, though maybe in-line with gas price rise.)
 

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I was referring to the AlNiCo motored Foster 10F3 supplied as OEM driver in the thousands before the Fostex name was ever stamped on a product. FWIW, this is the driver - along with the RS 40-1197- that got more than a few of us intrigued with the whole small full-range sub-culture.
 
What about the Shure SM58?
Don't know when it exactly started production but I think i've read somewhere they used some "prototypes" at the woodstock festival. Nevertheless I wasn't born yet so.... 🙂

The SM58 was launched in 1966, and the Shure SM57 (it's brother) in 1965. Both are still in production and are industry workhorses that are used all over the world by everybody, on all levels in the audio industry.
 
and the price for the top of the line anniversary, etc editions increased by probably at least that much. i.e. 45 times?
FWIW, the Rega line of ‘tables debuted in ‘73 as well. Over the past 25 or so years, I’ve owned several models by each maker, and my last Planar 3 cost less than the sales tax on a higher end LP12.