Identification
ID in this catalogue SL Louvre N 781
Type L-shaped 
Current Location

Musée du Louvre, Paris.

Sully Wing, Ground Floor, Room 6, "Writing and Scribes", Vitrine 6 "Weights and Measures" (Louvre Atlas database) 

Catalogue Numbers N 781 
Provenance Unknown 
Date 1400-1350 BC (Louvre Atlas database) 
Dimensions H 49.8 mm, W 31.8 mm, D 18.5 mm (Louvre Atlas database) 
Material Wood (Louvre Atlas database) 
Markings and inscriptions The reconstructed scale uses lines across the width of the scale in the 3:6:9:12:15 length ratios. The gnomon block contains a hole and vertical reference mark for a plumb bob on one side. "Amenhotep III offering Maat to the sun god; on the short side [opposite the plumb bob mark], the goddess Sothis "mistress of the year" (Louvre Atlas database)  
Notes This is the gnomon part of an L-shaped sundial. It is on display with the missing parts reconstructed in modern material. The reconstruction also includes an ancient-looking plumb bob. The original relationship between the plumb bob and the gnomon is unknown. 
Literature

Borchardt (1920) p. 32 ff.; Salmas (2014)

 
Images

Three images are available in the Louvre Museum's online catalogue here