Just a little documentation to go a long with the fine answer you already received; it seems it wasn't until the 1940's that registered trademarks really became important to manufacturers. Here is what the USPTO site has concerning this mark:

Word Mark SF
Goods and Services (EXPIRED) IC 014. US 028. G & S: ECCLESIASTICAL GOODS-NAMELY, CHALICES, CIBROIUMS, SANCTUARY LAMPS, JEWEL LAMPS, BAPTISMAL SETS, BAPTISMAL SHELLS, BAPTISMAL CANDLE HOLDERS, PATENS, PYXES, OIL STOCKS, HOLY WATER SPRINKLERS, SICK CALL SETS, COPE CLASPS, VEIL CLASPS, TABERNACLE KEY TASSELS, ABLUTION CUPS, VASES, CRUET SETS AND TRAYS, LUNA HOLDERS, BREAD BOXES, AND ALTER SETS; AND RELIGIOUS ARTICLES-NAMELY, VOTIVE LAMPS, CRUCIFIXES, CROSSES, ROSARIES, MEDALS, BADGES, EMBLEMS, RINGS, AND BOOKMARKS, MADE IN WHOLE OR IN PART OF PRECIOUS METAL OR PLATED WITH SAME. FIRST USE: 19120729. FIRST USE IN COMMERCE: 19120729
Mark Drawing Code (3) DESIGN PLUS WORDS, LETTERS, AND/OR NUMBERS
Design Search Code 24.15.25 - Other arrows
Serial Number 71470641
Filing Date May 25, 1944
Current Filing Basis 1A
Original Filing Basis 1A
Registration Number 0414427
Registration Date June 12, 1945
Owner (LAST LISTED OWNER) SWIFT & FISHER, INC. MASSACHUSETTS. NORTH ATTLEBORO, MASS.
Type of Mark TRADEMARK
Register PRINCIPAL
Affidavit Text SECT 12C. SECT 15.
Live/Dead Indicator DEAD
.