- unitdate
-
{"value"=>"1911", "type"=>"inclusive", "normal"=>"1911"}
{"value"=>"1936", "type"=>"inclusive", "normal"=>"1936"}
- date_inclusive_start
-
1911
- date_inclusive_end
-
1936
- unittitle
-
{"value"=>"Letters sent"}
- container
-
{"type"=>"box", "value"=>"1"}
{"type"=>"folder", "value"=>"48"}
- unitid
-
{"type"=>"local_mss", "value"=>"553731"}
- date_start
-
1911
- date_end
-
1936
- keydate
-
1911