What type drill bit "head" is this?

[Jerry Olexa]

Finally finished cleaning the morse tapers....Now have to sort them..A few Nationals and other brands in there too.....Twas a bigger job than I expected....Still confused over the #1,#2 designation? Something to do with shank size?
Thanks guys for your help..

[Bruce Page]

Jerry, if you go to Amazon and search Morse taper drill bit you will see several examples in different sizes. Morse taper drill bits, reamers, spade bits, etc. are common in the machine shop world. Most every engine lathe tail stock has a MT. Typically, the larger the lathe, the larger the MT. For example, my 14”X40” engine lathe’s tailstock is a Morse Taper #3 (see pic).

[Bill Dufour]

Here you go. Morse was trying to get them all the same angle. his tools and measuring ability got it close but not exactly the same. this means each size has a unique angle.
I believe he was trying for 5/8" per foot of taper.
Most likely you are looking at MT 1,2 and 3
Bil lD.

https://littlemachineshop.com/reference/tapers.php