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Picture one and two are of a late? model Lot 5 lathe that still uses the silent chain drive?but also has a reversing motor.? This was the next to last version of the?overhead drive built for metal?turning lathes.? Picture three is the first model Dalton built we think in 1915.? This lathe is a Lot 6 serial number 127 built in 1915 or early 16.? It uses a planetary?drive and two clutches for forward and reverse?with a non reversible?motor.? These drives cost almost as much as the lathe did.? Very heavy and things wore quickly.? The fourth picture is of agear reduced drive?built for the TL lathe that was marketed in the lathe 1920's for electrical shop repair work.? The example I have?came from an electric motor repair shop.? The gear reduction was to slow the lathe down for metal working rather than the wood paten work that the TL was none for. There was one more late 20's drive?that?was almost identical to the one I show in the first two pictures.? The only difference?was the?lever you see hanging down was eliminated.? This one I? have the lever is usd to disengage a clutch we think so the spindle could easily be free wheeled.? It did not work very well and was eliminated but the silent chain drive was kept. One note is that these overhead drives were very heavy and the lathes were prone to tipping over.? But not like you think, not forward or backward but rather end to end with the head stock hitting the floor.? I realized this when we almost tipped one over during a move and it really surprised us that it was so easily flipped end to end. Also if an overhead drive was ordered with a bench mount lathe you got a special? bed foot for under the head stock.? These were three times wider than the standard bed foot.? Again to help support the weight of the overhead drive.? I have a set of these bed feet but unfortunately they were broken with a poorly welded repair. Also many of these drives after being tipped over the tall column?casting were broken.? I have one example where the overhead drive was adapted to a behind the lathe drive eliminating the tall casting.? I have two of these tall castings that have been broken and badly repaired. The example I have is on my serial number 36 Lo2 lathe you see in the last picture. Hope you guys find the information of interest.