BOSS DM-2 Analog Delay 1983 Vintage Guitar Effect Pedal Made in Japan ACA F/S

Description

This Boss DM-2 Analog Delay  Vintage was Made and used in Japan. And was manufactured in May, 1983 according to the Boss Pedal Serial Decoder.
This BOSS DM-2 is a later model. One of the BBD elements is MN3102 and the other is MN3205. OP-amp is JRC4558DD.
We have confirmed the sound output with both ACA power suply and 9 volt battery.  The operation is very good and it sounds very good. You can also get a pleasant oscillation. Please check it out in the video.
The serial number is 305700.