A full service instrument shop specializing in marine compasses, weather instruments, spotting scopes, binoculars, telescopes, clocks, barometers, custom weather stations. Our service department is unmatched in the fields of compass repair, clock and barometer repair.

Originally designed in 1947 by Wilfrid Gordon White of the Kelvin White Co., the Constellation compass series was available in 5,6,7 and 8 inch "apparent card" sizes.The Kelvin White Co. became the Wilfrid O. White and Sons Company which was sold to Danforth in 1961. Danforth added a 4 inch Constellation to the line. Danforth was sold to Rule Industries in the 1980's. Rule Industries added a 4-1/2" Constellation to the line. The Constellation compasses are still made to this day. To determine which size compass you have, measure the diameter of the clear dome. The 6" Constellation dome measures 6-3/8" in diameter.The 6" Constellation compass takes approximately 70 ounces of compass oil to fill. Click on the schematic to enlarge the diagram. The key number in the diagram is the first number of the item number. 6inchdanforth Dial assemblyOld style jewel posts with a straight shaft only are no longer available. All 6" dials come with new style jewel posts which are threaded on the bottom. They will retrofit easily to the old style. 1-A10045SA$199.00Dial Graduations: 2 Degree5 Degree Jewel post type: new style Pivot W/Retainer "A" 2-A12315SA$67.00 6" Card (4-1/8" diameter) The 6" dial is available in the 2 degree style only. 3-A10035$40.00Dial Graduations: 2 Degree5 Degree Jewel W/PostThe original style jewel post is a straight post only and is inserted into a threaded bushing, that style is no longer available. It was replaced with this version that is a one piece jewel post with bushing. 4-A12782$39.00 6" Magnet and Frame ("Frog") 5-A9514 Retainer-B 6-A9515$10.00 Lubbers Line Pan AssemblySpecial Order 10-A9878 6" Gimbal Ring 11-A14501A$46.00 Screw, Light Retaining (4-40 flat head) 17-A12907$0.36 6" Low Level Light Assembly (12 Volt)For parts breakdown see the Danforth lighting page. 18-A14519A$81.00 Light Retaining Bracket 20-A12566$25.00 Screw, Top Bezel Ring Retaining (6-32 Flat head) 21-A9995$0.36 O-Ring 23-A12373$18.00 DomeThe 6" dome measures 6-5/16" in diameter at the base. 24-A9994$70.00 Screw, Light Bracket Retaining (4-40 fillister head) 25-A691$0.36 Gimbal Ring and Lubbers Line Pan Assembly 26-A14500$125.00 Filler Plug Gasket 27-A9504$4.00 Filler Plug (Brass) 28-A9860$14.00 Diaphram , Expansion (3-7/8" diameter) Used on 5" and 6 " Constellations6" Constellations made prior to approximately 1980 used a larger Diaphram (4.5" in diameter) They are currently only available by special order. Please call. 30-A12386$49.00 Expansion Retaining Screw (6-32 fillister head) 32-A9995$0.36 Expansion Retaining Ring (5" Old Style & 6" New Style)This diaphram retainer is used on the old style 5" Constellations as well as the new style 6" Constellations that have a 3-7/8" diaphram 32-A13002$34.00 GETTING YOUR COMPASS REPAIREDViking Compass Repair Service specializes in marine compass repair. We repair compasses manufactured from the early 1800's to present day marine compasses. We are an authorized warranty repair station for most compass manufacturers, including but not limited to E.S.Ritchie, Danforth, Rule, C. Plath. We also repair compasses by: Aquameter, Star Compass Co, Marine Compass Co., Dirigo, Wilfrid O. White and Sons, Kelvin White, Kelvin Hughes, Wilcox Crittendon, John Bliss, Cassens and Plath, Baker Lyman, Lionel, Suunto, Plastimo. In January 2010 Viking Instruments purchased the entire inventory of Danforth and Aquameter compass parts as well as the tooling necessary to continue manufacturing replacement compass parts. Viking Instruments is the exclusive manufacture and distributer of Danforth and Aquameter compass parts and service. If you are interested in getting an estimate to repair your compass. Pack it up carefully and ship it to; Viking Instruments, Inc. 41 Summer St (Rte 3A) Kingston MA 02364 Please be sure to include your name, address and phone number with the compass. We will contact you via telephone or email within 2-3 working days from receipt of your compass. Most current production compasses can be repaired and be ready for return shipment within one week of the date of customer approval. If you wish to speak to someone in our shop concerning your compass you may call 781-585-2100 Monday- Friday From 9:30-5:00 E.S.T..Our retail Store is open Monday - Friday 12:00-5:00. Dealer Inquiries Invited.