Until around 1947, Conn used the prefix letter "M" before a serial number as their catalog designations for "Saxophones".However when they restructured their serial number sequences and catalog listings in the 1960's, they began to use letters as a prefix to serial numbers to designate the year made. If you wish to know the date of your horn, post some photos and I will ID it.I personally would say go with aa Chu Berry..which is M150000-M220000 (serial number range) or somewhere in there. "Just noticed that the "lol" symbol looks like a drowning guy, and all you see is his head and arms sticking out of the water. Otherwise, it is a Nogales AZ made student "DIRECTOR" model sax.
These were either New Wonder models or "Standard" models.
There's "Mexico" stamped near the thumbrest on the Mexiconns. Get a note to jaye SF here on these pages if you're looking for a reasonably priced used horn. A Mexican (N-number) made shooting stars and I like it very much.
Mexiconn's do not have CONN USA stamped on the bell. If there's one in great shape for about 0 - 0 its o.k.
Here are a few things to bear in mind: When advertising an instrument for sale, you will often see the serial number referred to as 36xxxx.
It is rumoured that there is a scam, by which somebody who acquires your serial number can then claim the instrument is theirs.