Object: Flat Celt
Period: Bronze Age
Collection: Manx Museum,Isle of Man,5,Cat. No. 1
Site: isle of man,kirk-andreas,near the church
County: Isle of Man
Country: Isle of Man
Year of discovery: NA
Length (mm): 100
Width (mm): Butt 36
Edge (mm): 56
Thickness (mm): 11
Weight (g): 311.85
Composition: Cu 99.1,Sn 35,Fe 20,[...]18
Other: from the context and alignment of the figures in the Composition field on the card, I think they may be percentages and that author means it to signify "Sn 0.35,Fe 0.20,[...]0.18"