This reel is believed to be a Carswell Modified Illingworth circa 1914. " In 1912, Morris Carswell of Glasgow, Scotland applied for a patent for his new threadline reel. The reel just happened to be very similar to the Illingworth No. 2 with a half-bail and the patent application was challenged by Illingworth. To save the expense of a legal battle both parties agreed to terms. Carswell was allowed to manufacture the reel as long as his reel was marked Carswell Modifie...d Illingworth and royalties paid to Illingworth. The agreement lasted until 1925 when Illingworth discovered Carswell had not made payment on his patent. After all that, this same reel would reappear in 1926 as the A. Allen "Spinet". This reel is believed to be a reel manufactured by Carswell prior to the legal battle which is why it is unmarked. Now the early first model No.1 Spinet, circa 1926, was a dead ringer of the famous Carswell Modified Illingworth No.2. Most early first models were marked on the spool face with only the patent number while some were not marked at all" This is a very interesting reel full of mystery and intrigue. Lots of history wrapped up in this reel. The most peculiar aspect of this reel is the spool screws on to the cup just as the Illingworth No. 2 does. The Spinet No. 1 has a screw that protrudes through the spool and screws to the cup. This is why I believe this reel to be a Carswell Modified Illingworth. Happy to discuss this with you.