I recall back in around 1980 +/- when I lived in Sitka, AK. I had my 8 3/8” nickel M57 in a Bianchi shoulder holster while fishing. It fell out mainly because of my own stupidity. I wrote Bianchi saying I thought the holster could use a removable thumb strap to prevent that from happening. I drew up my ideas and sent them to Bianchi in California. To my surprise a couple months later, a box shows up from Bianchi. It had a shoulder holster for an 8” revolver with a thumb strap added. There was also a letter thanking me for not being an *** and giving them a constructive idea. I’ve always appreciated that, even 40+ years later. I’m pretty sure I saw that same holster as regular production item in the next catalog.