Looks charmingly bad, sounds deceptively great. This shares the same basic control set as the better known Boss CE-3, but has a certain warm wobbliness more akin to the famed CE-2. It's a perfect example of an 80s 'sleeper chorus': maximum thrills, minimum dollars. 

Model: Arion SCH-Z Stereo Chorus
Made: Sri Lanka, mid 1980s (serial 156887)
Type: chorus
Power: standard 9v negative supply or 9v battery (not included)
Switching: buffered bypass
Equivalent new street price (approx): n/a
Mods: none
Accessories: no box or manual
Condition notes: used, few minor marks, very good condition