Bill,
As a Journeyman Toolmaker, let me tell you that I've never been all that impressed with $terrett, but we all have our own opinions. Since I work mostly with SAE sizes, or do the conversion to them, I use an old 0 - 9" Browne & Sharpe depth mike set. What the heck, If real accuracy is needed, there's gage pins, comparators and Jo blocks, eh? Anyway, the set is in real nice shape, and I'll take $20.00 Priority insured to you.