Show WINDOW probably no envelope made has come into greater and wider use than has the window envelope anis envelope sold under the various copyrighted copy righted names of outlook self addressed address saver at see thru etc has back of constantly increasing demand american efficiency it has often been said that the cst cast of addressing an envelope is creator than the cost of the envelope itself there is no question regard ng the truth of this tais statement but a far greater factor in bringing the window envelope into more universal use everyday is the anvel ope assurance that the proper bill invoice check or letter when mailed in the window envelope goes to the proper you may have had bad it happen in your own business that some sort of correspondence correspond ance has been put into the wrong envelope or into an improperly addressed envelope the result is inevitable if your correspondence has not been received by the wron wrong 9 person it has gone astray with a re of time in an important deal or an exacting transaction the window envelope can be made in in any size and contrary to a rather prevalent belief is made wit with h the window in any location desired to fit any statement invoice or form so long as the opening is kept within the space allowed by postal regulations rt gula uncle sam h has is this to say about I 1 the window envelopes to be the opening in tho the window envelops envelope shall not liot occupy any space within 1 38 3 8 inches from the top nor within 38 3 cofan 8 of an inch from the bottom or ends of the envelope such envelopes must bear the return caid cai d of the sender which shall be placed in the upper left band corner of address side the return card of the sender roust must show not only his name but also a street address with the name of the post office and state |