5x7.  This canvas carrying case is a long style, as advertised, so is probably the original equipment case.

Camera only with rear extension

Camera only without rear extension

Rear View - Perspective.  The cardboard inserted in front of the ground glass was added by a previous owner to limit the view to a 2¾x6" panorama.

Bottom

Top

Label, nickel-plated brass and black paint, lower part of front standard.

Plate holder - profile and size the same as modern film holders.

"Verigraphic" asymmetric rapid rectilinear-type lens in Wollensak "Regno" No. 5 shutter.  The cardboard lens cap is from an Edison phonographic cylinder of the song "The Lighthouse by the Sea".

Date Introduced: 1914 ; Years Manufactured: 1914-1915
Construction: back and front focus via rack and pinion (two gear tracks on top of the base rails); double swing; reversing by removable back; 
Materials: cherry base, black fabric bellows; lacquer finish
Sizes Offered: 5x7; 6 ½x8 ½; 8x10 (photos); 11x14; 14x17; 17x20
Notes: This model has the familiar rear standard with a teardrop pointed down that is found on most Seneca cameras.  It also continues the Camera City feature of the short hinged base started with Variation 1.

References:
1913 catalog shows Variation 1, so Variation 2 was thus introduced in 1914.
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), Catalog N, c. 1914, pp. 32-34
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), Catalog P, c. 1916, pp. 31-34
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), Catalog Q, c. 1917, pp. 30-31
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), Catalog R, c. 1918, pp. 30-31
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), Catalog S, c. 1919, pp. 26-27
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), Catalog T, 1919, pp. 24-25
Catalogue of Cameras, Kodaks, Lenses and Photographic Accessories 1919-1920, Central Camera Co. (Chicago, IL), 1919, p. 32
Catalogue No. 10 and Bargain Book No. 11 of Cameras, Kodaks, Lenses and Photographic Accessories, 1920-1921; Central Camera Co. (Chicago, IL), 1920, p.31
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), Catalogue V, c. 1921, pp. 30-31
Seneca Cameras, Seneca Camera Manufacturing Co. (Rochester, NY), undated c. 1923, p. 22
Catalogue No. 21 of Cameras, Kodaks, Lenses and Photographic Accessories 1923-1924, Central Camera Co. (Chicago, IL), dated 1923-1924, p.47
Seneca Camera Manufacturing Co. Catalog, 1925
Catalogue No. 27 of Cameras, Kodaks, Lenses and Photographic Accessories 1925-1926, Central Camera Co. (Chicago, IL), 1925, p. 59
Catalogue No. 31 of Cameras, Kodaks, Lenses and Photographic Accessories 1926-1927, Central Camera Co. (Chicago, IL), 1926, p. 70
Catalog of Photographic Apparatus and Supplies, Catalog No. 121, Chicago Photo Supply House (Chicago, IL), c. 1926, p. 5 (as the Rexo Special)

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