Here is the the text of the first two pages of my Singer manual (supplied by my father):

THE IMPORTANCE OF USING
"SINGER" LUBRICANTS FOR YOUR
ELECTRIC SEWING MACHINE

"The Best is the Cheapest"

Use SINGER Oil on Machine

Knowing from many years. experience
the great importance of using good oil.
Singer sells an extra quality machine oil.
in cans, especially prepared for sewing
machines.

Use SINGER Motor Lubricant on Motor

Tne SINGER Motor Lubricant is
especially prepared for lubricating the
gears and bearings of the electric motor.
This is a pure nonflowing compound
which retains its consistency and
posesses high lubricating qualities.

Copyright, U. S. A.. 1915. 1920, 1921. 1923. 1924,
1926. 1928, 1931, 1932, 1933. 1935, 1936. 1937,
1938.1939.1941and 1947 by The Singer Manufacturing Co.
ALL Righs Reserved for all Countries

INSTRUCTIONS FOR USING
SINGER
ELECTRIC SEWING MACHINE
(P. H. Built-on Motor)
201-2

REVERSlBLE FEED
HORIZONTAL ROTARY HOOK
FOR FAMILY USE

THE SINGER MANUFACTURING COMPANY