Here are three planes that show a differences in design and
Three generations of cast infill planes, made with Slater's
As the form changed, the little nuances first appeared such as
cutouts to allow the easier removal of shavings and ultimately
to the development of the lever cap.
Heavy tallow staining on the left plane could be an evidence of
pre-electric lighting in the shop. Tallow candle illumination
was the common method of artificial lighting of the period.
Slight, evolutionary changes over time.
Changes in shavings escapement profile.