Hello All - I'm no expert here but this is some of what I've discovered:
The Hanlons were acrobats and not manufacturers . In France, while touring Europe in 1867, they saw the new velocipede in use. They helped to introduce the velocipede to the American public by adding them to their stage act in the Spring/Summer of 1868. Calvin Witty, a NYC carriage maker, built velocipedes for the Hanlons. He went on to build his own velos and then capitalized on the Lallement patent which he purchased . Many people - carriage makers like Brownell & Sargent as well as local blacksmiths - copied the Hanlon design which is why so many have survived. Very simple, easily made, and cost effective to build. I believe that all of the Hanlon velos pictured here in this thread (with the exception of that which Bill noted as a re-pop), including the initial museum bike, are genuine. I have never seen a machine stamped with the Hanlon name. I have seen examples stamped by Brownell and Sargent. Several Hanlon type machines have sold at the Copake auction.
I have included an image of a Hanlon type machine that is on display in a museum in Colorado. Rather than having a curly cue or mustache leg rest detail on the frame above the front wheel, it has a flat paddle. Could this be for balancing upon ? A place to place ones' foot ? Is this an example of a true surviving machine used by the Hanlon-Lee Troupe ?
https://www.britannica.com/topic/Hanlon-Brothers It seems functional and more than a design detail .
The other image is of a velocipede built by Calvin Witty. This was constructed in the serpentine style of the Lallement patent of 1866. It too is pretty crude and
probably dates from the Summer of 1868. This was at the beginning of the velocipede craze that swept America and was over by the Autumn of 1869.
Carey Williams is quite knowledgeable and could add a lot here.