K&E 4053-3 10" Polyphase Mannheim 1915-1921
with unusal replacement cursor
These scans are from the collection of Clark McCoy
This 4053-3 is clearly an early rule with a replacement cursor. The cursor is all glass with raised corners on the blocks. This cursor was only produced between 1933 and 1936. It has the side indicator for the K scale on the bottom edge.
Back side of slide
Left end view