I do mash up the hills pretty heavily - and I suppose at 235 lbs I qualify for Clydeness.
Can't say what brand the bb is, (until the suggestion of brand, I assumed that the bracket was just the hole all the bearings and spindle are housed in)only that it's a 25 year old US made Ross mountain bike. I've replaced a number of components, starting with wheels that flexed and seemed beyond rational repair.
I obtained it used and started heavy use last year, going maybe 50 to 100 miles per week in commuting (15 miles round trip) and fitness rides up to 15 miles.
I need to learn more about repair - I can handle obvious simple stuff, but taking apart bearings would make me nervous...