Waterman's Pressure Bars Bar Size in Inches:Bar 12 There is well executed set

There is well executed set of initials on the back "RB or BR"

you can usually come close enough to the size you need to fit into your piece and roll or hammer dents out (using a soft hammer

This piece has Sterling & other hallmarks on the clip

Also available in acrylic

HOLE IN BEACK CAN HOLD M400 AND SMALLER PENS

Waterman's Pressure Bars Bar Size in Inches:Bar 12 There is well executed setPressure bars for American Made Waterman's Fountain Pens. Used, original Waterman's parts. Available in various sizes. Note: The sides of these pressure bars are oriented toward the front of the pen as shown in the second photo below. (I've always had a rough time remembering that when the time came for putting the pen back together) BAR 2: 1 33 64" = 1. 516 inches BAR 6: 1 3 4" = 1. 75" BAR 8: 2" BAR 10: 2 3 16" = 2. 188" BAR 12: 2 5 16" = 2. 312"