Sandsteel
Information from Wholesale, Retail, and Manufacturer’s Catalogs
Sandsteel Mainsprings Catalog
Sandsteel Mainsprings
for
Seth Thomas pocket watches
Sandsteel
Made by the Sandsteel Spring Division of Sandvik Steel, Inc. aka Watch-Motor Mainspring Co. Inc.
Sandsteel Mainspring Package No. 536 – Seth Thomas 18-size, 3.30 millimeters wide, 0.195 thick, or, 24 wide, 3 3/4 thick Dennison gauge
Seth Thomas Model 6 & 7
Model 5 ser#’s 300,000 to 350,000
Sandsteel Mainspring No. 536 – Seth Thomas 18-size, 3.30 millimeters wide, 0.195 thick, or, 24 wide, 3 3/4 thick Dennison gauge
Sandsteel Mainspring Package No. 729 – Seth Thomas 18-size, 3.30 millimeters wide, 0.225 thick, or, 24 wide, 1 1/2 thick Dennison gauge
Seth Thomas Century Models 10 & 11
Sandsteel Mainspring No. 729 – Seth Thomas 18-size, 3.30 millimeters wide, 0.225 thick, or, 24 wide, 1 1/2 thick Dennison gauge
Sandsteel Mainspring Package No. 2106 – Seth Thomas 16-size, 2.40 millimeters wide, 0.22 thick, or, 15 wide, 2 thick Dennison gauge
Seth Thomas 16-size Centennial Model 21
Sandsteel Mainspring No. 2106 – Seth Thomas 16-size, 2.40 millimeters wide, 0.22 thick, or, 15 wide, 2 thick Dennison gauge
Sandsteel Mainspring Package No. 2521 – Seth Thomas 12-size, 2.00 millimeters wide, .20 thick, or, 11 wide, 3½ thick Dennison gauge
Seth Thomas 12-size
Sandsteel Mainspring No. 2521 – Seth Thomas 12-size, 2.00 millimeters wide, .20 thick, or, 11 wide, 3½ thick Dennison gauge
Sandsteel Mainsprings box of 12