introduced and since both the 512K and 128K were sold for a while, Apple needed to distinguish them, hence the 128K emblem on the rear.
Serial number F44840AM0001 which decodes as follows
Your Macintosh 128 (M0001), with serial number F44840AM0001, was the 4634th manufactured during the 48th week of 1984 in Fremont, CA
This unit has been upgraded to 512K and a 800K floppy drive. It also has a hard drive, likely a 10 or 20MB, but it is not spinning up.
The unit also has a fan installed in it and of course the inside rear housing has the signatures of the Mac team embossed in it.
Unit will be well packed and shipped in a heavy duty box.