My 300 was bought in 1971. My dad wanted to arm us for inshore, took me to Best Products, and told me to pick it out. I came home with a 7' Berkley Tri-Sport rod and the 300, 14-lb Berkley mono. From an aluminum semi-vee, we fished many of the same sloughs along Aransas Causeway where I kayak now, and of course the jetties for Spanish mackerel (smacks).
The Mitchell landed several 24-26" redfish, brought in a sow trout one day that had to be 30", but she spit the hook right at the boat. Certainly where the reel took the most abuse was large numbers of smacks at the jetties - somewhere along the way the gears became as loud as a train.
There were no limits on seatrout then, and redfish was 14" min, but still don't think there was a bag limit. Those little reds are a perfect size to blacken, but what the state has done with newer regs is great.
Also pretty early with the reel, I gave it the power handle from a 400 (looking for photos, but can't remember where)
Also used the reel for reservoir bass fishing - when I went to college, my dad joined a local bass club - it was never really my thing, mostly because the Texas sun makes it unbearable by 9 am.
Though I've always been one for pushing tackle - home from college at 19, I landed an 8-lb reservoir bass on a Daiwa Minicast.
Also had my first Daiwa Millionaire 6H about this time (and would kill it in the surf 10 years later).
Still have my Mitchell 300 stashed - wish I had the Heddon I picked out a few years before that, but don't know what happened to it.
The 410 is a big step up from the 300, and people I've recommended 408's for UL have thanked me later.
But the response to a Penn Spinfisher remains, what was I thinking when I was using a Mitchell.
Interesting about Hardy's flip bail patent, which because of wartime extension didn't officially expire until 1954 - though by 1952 pretty much everybody had their versions on the market. And back on topic - when Hardy introduced the Exalta, they copied Mitchell's bail.
I still like the function of Penn' s bail best, and their gears are forever smooth and durable.
Another reel I'm going to bring up because it's a close second to Hardy Altex all-time-smoothest spinning reel kudo, and especially great for its prewar origin - Luxor - don't confuse the Airex license reels with the French-made Luxors, and even the 1970s Crack reels have a salt fan-club today.
And my all-time favorite glass light-spinning rod, H-I Star