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 G. White of the Kelvin White Co., the Constellation series compasses were available in 5",6",7" and 8" sizes with the Kelvin-White name on them. The Kelvin-White company became the Wilfrid O. White and Sons Co. and the Constellations were made under that name until 1961 when Danforth bought the company and used the name Danforth-White on the compasses, finally dropping the White name in the late 1960's to become Danforth compasses. Danforth added a 4" constellation to the line. In the 1980's Rule industries bought Danforth and continued using the Danforth name. Rule added a 4-1/2" Constellation to the line. Contellations are still manufactured today. To determine which size Constellation you have, measure the diameter of the clear dome. The 8" measures 8-3/8" in diameter. The 8" Constellation takes about 1.25 gallons of oil to fill it. Click on the schematic to enlarge the diagram. dan8part Top RingSpecial Order A10111 Oring A12375$45.00 DomeThe 8" Dome measures 8-3/8" in diameter at the base. A10112$125.00 Dial /Float Assembly Special Order A10145 Dial and Pan AssemblySpecial Order A12228 Plug gasket A9504$4.00 Plug Screw A9860$14.00 Expansion Diaphram A12389$78.00 Expansion Retaining Ring A10117$170.00 Bottom CanSpecial Order A10113 Expnsion Ring Retaining Screw A5423$0.36 BowlSpecial Order A10108 Pan AssemblySpecial Order A13399 Wilfrid O. White, Kelvin -White, Danforth 5", 6", 7" and 8" Old Style Channel LightThe channel light was used on all of the original Constellation compasses (Kelvin-White, Wilfrid O. White, Danforth-White and Danforth).The same light was used on all of the original Constellation compasses, however each size compass had a specific "ladder". There was a 5",6",7",and 8" ladder for each size of Constellation compass made. dan5oldchanlight 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.