See Princely Splendour: The Dresden Court 1580~1620. Scroll about 3/4 of the way down and see

Folding Multipurpose Tool, Nuremberg, c.1560-70.

From Medieval Sawdust, where members noted that the tool had:

• a file
• a saw
• some things like custom shaped allen keys
• a skeleton key
• two gimlets (small drills)
• a skew chisel

[The Electors of Saxony] Christian I (r.1586-1591), Christian II (r.1591-1611), and Johann Georg I (r.1611-1656) expanded the collections. Their acquisitions not only reflected their individual tastes but also their passion to enrich the Dresden court so that its splendour would impress upon visitors their wealth and culture.

Note that Johann Georg I was Elector during the 30 Years War. Saxony was a major battleground during the war. C. 1630 it was a somewhat reluctant ally of Sweden, so it it possible that that Gustavus Adolphus saw this tool in his German campaign.

The dark side of this collection is that Johann Georg I changed sides 2-3 times during the war, but the result was always that his lands were devastated by his vengeful former allies. What the article does not tell you is that his people suffered terribly from the armies on both sides while he was collecting and enjoying these marvelous artifacts.