Correspondence, memoranda, letter patents for a combination tool to be used in expanding boiler tubes; invented by his brother Harry Del Mar

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unitid

{"value"=>"1714110", "type"=>"local_mss"}

unitdate

{"value"=>"1901-1902", "type"=>"inclusive", "normal"=>"1901/1902"}

date_inclusive_start

1901

date_inclusive_end

1902

keydate

1901

date_start

1901

date_end

1902

unittitle

{"value"=>"Correspondence, memoranda, letter patents for a combination tool to be used in expanding boiler tubes; invented by his brother Harry Del Mar"}

container

{"type"=>"box", "value"=>"2"}

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