Underwood, a London-based family concern, was in business from 1820 to 1925. While that postdates the Industrial Revolution, this object appears to have been hand-forged rather than mass-produced.
The design is quite interesting: Detentes on the bottom of each tool hold them nested against each other in the closed position, and the bow shape of the handle doubles as the spring that provides the pressure to hold them against each other. Gaps between the nested detentes indicate either the inconsistency of hand manufacturing techniques, or wear from the most frequently used tools.
Reddit being Reddit, there is debate about the function of some of the tools. Here's one proposal:
A. A hook sailors used for untying knots
B. A dosing cup for powdered medication
C. Screw starter, long
D. Screw starter, short
I. Random pick
J. Hook for snagging fishing lines
I'm no expert, but I'd guess "F" is not a toothpick, but either an awl or marlin spike. And I think "I" is a reamer.
Underwood was not the only producer of such a tool. On Etsy you can see this Antique 9-Tool Bow, estimated manufacturing date 1905 – 1920 by Charles Barrett, another London-based cutler:
The order of the tools is slightly different but the design appears otherwise identical. And this one has a surviving leather case.
It's also not clear if the original designer of this tool was British. An antiques site posted this German Folding Bow Multi-Tool, estimated manufacturing date 1880-1900.
The top of the bow is faceted, I assume for decorative purposes, and the inconsistency of the detentes appears to be poor manufacturing rather than wear. (Note that some of the indents are perfectly triangular, others decidedly less so.)
It's weird to remember that there was a time when German-made goods were nowhere near the worldbeating quality they produce today.
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