Putting cap in milk bottles, Los Angeles, Calif., 1937

2 photographs showing a milk cap and a hand resealing the bottle with it, Los Angeles, California, 1937 March 27. "Client: Seal Right Co[mpany], Mr. Burnett, 3055 E[ast] 12 St[reet]; Operator's report, name: 'Dick' [Whittington]; in city; Amount: 6.00" -- on envelope. "Sealright Pacific, Ltd., 2 photographs as instructed, by Galr" -- on purchase order.