I spent a week with the Weston Master II and it served me well... The Sekonic TwinMate hit the drink early in the week so it was sitting out in a baggie of rice (it's fine)...
Most meter readings were palm of hand placed on Zone VI, something the Weston is particularly good at.
I've had a couple of bad Weston's but now I have a couple of good ones... They can be trusted.
But this is a thread about Exposure without a meter... On the last day of camp, the program director's father (a friend, who once caught me in the mountains with a digital camera and scolded me "Bill, I thought you stood for something") visited to celebrate the 60th anniversary... I wanted a photo of father and son, so I guessed the exposure and shot.
Afterwards, I checked incident reading with the (now dried-out) Twin-Mate. I was only off by one stop. I can't remember if I was off towards over or underexposure. But since I rate Tri-X at 250, being off one stop, in any direction, does not affect quality in any way.
So you CAN develop a good sense for exposure guesswork.