International R102 utilizes 194 bulb size for front side marker and 97 bulb size for rear side marker applications. The replacement chart covers 1953 to 1955 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International R102 uses the 194 bulb for the front side marker position across the 1953-1955 model years under the Light Duty classification.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, conforming to ANSI standards recognized in both the United States and Canada.
The wedge base of the 194 bulb relies on the tension of its glass envelope contacts rather than a separate metal base to secure it in the socket, which distinguishes it from bayonet-style fitments.
The International R102 uses the 97 bulb for the rear side marker position across the 1953-1955 model years under the Light Duty classification.
The 97 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and is classified as a variant of the 1156 bulb type.
The BA15s bayonet base features a single locating pin, which means it is not interchangeable with dual-pin bayonet bases such as the BA15d without a socket adapter.
The rear side marker draws significantly more wattage than the front, with the 97 bulb rated at 13W compared to the 3.78W of the 194, reflecting a difference in intended luminous output between the two positions.
Both the 194 and 97 bulbs conform to ANSI standards, indicating that their electrical and physical specifications are governed by a standardized classification system used across North American automotive applications.
Although the 97 is described as a variant of the 1156, the two are not necessarily direct drop-in replacements for one another, as variants within the 1156 family can differ in wattage, base pin placement, or envelope size.
The consistent bulb assignments across all three model years indicate that the front and rear side marker socket specifications remained unchanged throughout the 1953-1955 production span of the R102 in the Light Duty configuration.