US PO Forms and Tags

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Form Number 1556
Division
Title Receipt for Registered Packages
Where Used Half-sheet used to obtain receipts for Registered Package Envelopes
EKU 1878 DLS
LKU 1884 DLS
Notes 2 lines of text at bottom with nothing below. Uses of this version seen beginning June 1881, the example here with 1881 in m/s at top and 1880 (I think errantly) in the postmark.
Revision c1880 (01)