Eilert Janßen on X: "@DavidMith1 It's the Faber Castell TEKAGRAPH 9603 and the CRITERIUM 2113. I would try getting a TEKAGRAPH - it's well balanced and only 11 grams - lead included.
1 pc Germany FABER CASTELL Mechanical Pencil TK FINE 9715 Mechanical Pencil 0.35 /1.0 / 0.5 / 0.7 mm Professional Drawing Pencil - AliExpress