A sapper using a geophone. Military Mining 1923

A sapper using a geophone. Military Mining 1923

2 Responses to A sapper using a geophone. Military Mining 1923

  1. Pingback: THANK YOU FOR YOUR SERVICE | Pointe-Claire Public Library

  2. saw a movie base about this it was amazing yet sad but thank for thier service in war. I was intrested in the equiments name an I can across this awesome page. ITS CALL the GEOPHONE thanks for all info

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