David has rarely used gears in his kinetic sculptures because wooden gears are just too inefficient. In fact I can only recollect two sculptures - Anticipation from 1976 and Cadence from 1978 - that used meshing gears. That said I love gears, collect gears and have used them in my early sculpture work and even as subjects of paintings and drawings. (I am going back to the 70's here!). I bring up gears because a collector of David's work recently sent in the link to this YouTube video of gear studies noting that he thought we would relate to it.
This is a fascinating set of odd gear pairings. I wouldn't expect David to ever use them in his work but I can imagine a giant series on our front lawn!
Thanks Mark Y from Boston!