My father, who worked for the phone company, often carried one of these knives; I've seen lots of them pictured in this forum. I have a question about a feature of the secondary blade: what's the semicircular cut-out for? Most of the TL-29 pattern knives have one, but I've seen pics where there are two (and I think I saw one knife that had three.)
What's it for, and why would you need more than one?
What's it for, and why would you need more than one?