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Not sure if at that time, if the old world Europe would have honored U.S. patents (and copyrights), such as the Iver Johnson Arch Bar Truss frame design of the ToC.
Not sure if at that time, if the old world Europe would have honored U.S. patents (and copyrights), such as the Iver Johnson Arch Bar Truss frame design of the ToC.
I believe that there are at least 30 known (currently) French manufacturers who used the design. From around 1903 into the late 1930's.
Less frequently used by British manufacturers.
The split bottom bracket suggests to me a date right at the start of that date range.
Headset and bottom bracket threading will be a good guide as to whether its French or not.
Some Belgian manufacturers also used truss-bridge frame designs too.
The fork crown is of the Labor design.
Labor also sold complete frames to small producers who would build up machines and rebadge them with their own headbadges.
Another feature that I have seen on a couple of Labor bikes is that the year of manufacture is scratched/engraved on the fork steerer tube in Roman numerals.
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