Are These Double-Ended Gizmos Metric Measuring Spoons?

Good Questions

Q: At a rummage sale, I found two double-ended gizmos I think are measuring spoons, but their markings are not the usual teaspoon/tablespoon measurements, but rather 2.5, 5, 10, and 15. has a number of sets of metric spoons on offer, but all have Imperial equivalents, not just the numbers I see on my new acquisition.

Sent by Karen

Editor: Readers, any clues for Karen?

Related: Is This Wicked-Looking Mystery Gadget a Kitchen Tool?

(Image: Karen via The Kitchn's submission form)