No. 7 typewriter; Oliver Typewriter Co.

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Calle Morelos 531, Entre Coral y novena. 22840 Ensenada,  +52 646 385 8720  

The Oliver Typewriter nicknamed the "Batwing" was one of the first "visible print" typewriters, allowing text to be visible to the typist as it was entered.
Utilising a downstroke action, the keys, or typebars, strike the platten, or roller, from above, rather than from below, "up strike", or from the front, "front strike". The disadvantage of the "up strike" method is text is printed out of sight on the underside of the platen; the front "strike" prints text on the front of the roller.
The "down strike" and "front strike" are "visible print" designs, allowing the full page visible to the typist as the text is being entered.
The relatively greater striking power of the "down strike" design led Olivers to be preferred for specialty uses such as stencil cutting or "manifolding" (copying using carbon paper).
Oliver typewriters were finished with olive green paint or nickel-plating and white or black keyboards, depending on customer preference.
A very early typewriter as used by factory personnel following the change from handwritten records and letters to mechanical printing