A look at a vintage advertisement for Professor Anthony Barker’s Strength-Maker Bar-Bell System. The set was rather ingenious, the handles could be unscrewed from the globes which could then be filled with shot to adjust the weight. From just a few pieces of equipment, one could train with either a barbell, a dumbbell or a pair of kettlebells. It should also be noted that The $15.00 price tag equates to over $400 in today’s money.