Old Time
"Old time" and "old timey" are terms used to describe stereotyped images and representations of the late 19th and early 20th centuries in the USA, generally not more than a generation before or after the start of the 20th century. The term "old timeyness" is used more rarely. All these terms may also be used in a more general sense, in which case, they are synonymous with "old fashioned" or "antique".
Connotation
Old timeyness is sometimes considered campy and put forth as a sort of "ultra-corniness". At other rare times, it is used to invoke an era of integrity and quality that stands in opposition to inferior "newfangled" ways of doing things.
Distinctions
While they refer to the same era, "old time" has a different connotation than the term fin de siècle (end of century). The latter evokes images of sophistication to the point of decadence, a connotation opposite to that suggested by "old timeyness".
Old timeyness overlaps somewhat with aspects of popular culture intended to evoke Victoriana or the Old West. Often, however, the three are distinguishable.