MMMRA1991.394 | Signal codes for the mine cage
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Signal codes for the mine cage
Before 1954, 20th century
Metal and wire
0.5 x 30 cm
MMMRA1991.394
This artefact belongs to :© Musée minéralogique et minier de Thetford Mines
Keywords:
Signal codes for the mine cage
Before 1954, 20th century
Metal and wire
0.5 x 30 cm
MMMRA1991.394
This artefact belongs to :© Musée minéralogique et minier de Thetford Mines
Keywords:
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