The top flight on the left of the picture "No grip one" I believe to be from 1928 is it seams to have that as the patent date for this model. The banding around the throat also seems to have fallen off, unfortunately... The one in the middle is the red Les Stoefen model, believed to be created in 1930. I believe this to be the next iteration of the open throat model, as it has a shorter grip section on the handle and seems to have more designs on it. The one on the right I believe to be from 1935 to 39 as it has a leather grip, and the open throat also seems to be a little bit smaller, possibly an upgraded design. What I find strange about all of these racquets, is they all share the same patent number, 1664466, yet they are mix between Spalding and W&D.
The racquet in the bottom picture seems to be a slightly later iteration after the Les Stoefen racquet, possibly from 1933 to 36, yet appears to be slightly older then the top flite on the right of the first picture, due to the throat being larger.
From what I believe, just by looking at the racquets and not doing any other research, this may not be correct, but I believe Spalding and W&D started merging their products around 1928, creating the top flite and similer moddles sharing this patent number. However; the first racquet on the left actually doesn't have the number printed onto it, but instead U.S Patent April 3d 1928, going with my gut, I believe this is their patent applied for, they just didn't have the number yet. The racquets started receiving this number printed onto them after 1928. Resulting in many of my other open throat models from Spalding and W&D to have this patent number. This means they also probably shared similar product names, such as Longwood and Top flite. The racquets may also look similar as they are technically from the same company "Spalding", yet branded under two different names, due to the two being in the process of merging. Some very cool stuff, please let me know what y'all think and if I got anything incorrect please feel free to correct me and add any information you have!!
Date for patent pending on the left top flite racquet shaft "below"
Patent number of both the Les Stoefens and the top flite on the right "below"
Another modle by W&D from 1933 or later "below"
I have more with this patent number, but they don't look much different from these
I also just found this too, this may help others who are searching for something similar to this! This
https://patents.google.com/patent/US1664466A/en is the original patent date for the top flight and other open throat models it seems like by Spalding.