The calipers are Athena (D500) but they're not Monoplaners I'm afraid, just the usual single pivot design.
With Monoplaners one arm passes through the other, putting them on the same plane (hence the name); with regular single pivot calipers, one arm sits on top of the other.
The calipers are Athena (D500) but they're not Monoplaners I'm afraid, just the usual single pivot design.
With Monoplaners one arm passes through the other, putting them on the same plane (hence the name); with regular single pivot calipers, one arm sits on top of the other.