I believe these Comet bikes are replicas with Spacke engines.
Dayton with Spake engine.
A recreation based around an original engine, photos and blueprints.
Merged with Metz motorcycle company in 1906. Became Marsh-Metz or "M-M".
Earlier known as Light, Merkel light and Thor-bred.
In 1902 a Mitchell set the first 24hr. record. The bike traveled 634 1/4 miles.
Another re-creation I believe. Racycle eventually bought Merkel and started producing the Flying Merkel.
Winner of the first motorcycle economy run in the United States. Set the trans-continental motorcycle record in 1905.
Part of the family of bikes made up by Kenzler-Waverly, Waverly, Jefferson and P.E.M. All used engines designed by Perry E. Mack.