Marpan Supply Company, Inc.  
Searching marpan.com for incandescent three way
Results 1-5 of about 5 matching records.
Sylvania #18044 - 50/150A21/DLSW/RP 120V - 12/Case - A21 - Base - - Incandescent 3-Way 50/100/150 Watt 120 Volt Sylvania #18048 - 45/140A21/W/ES/RP 120V - 12/Case - A21 - Base - - Incandescent 3-Way 45/95/140 Watt 120 Volt
Sylvania #19380 - 30/100A21/DLSW/RP 120V - 12/Case - A21 - Base - - Incandescent 3-Way 30/70/100 Watt 120 Volt Sylvania #19385 - 30/100A21/W/RP 120V - 12/Case - A21 - Base - - Incandescent 3-Way 30/70/100 Watt 120 Volt
Sylvania #19404 - 50/250A21/W/RP 120V - 12/Case - A21 - Base - - Incandescent 3-Way 50/200/250 Watt 120 Volt