The Corona PC was initially released in 1983.
Model No. from back of case: PPC400-12 Serial No. from back of case: (hard to read) Serial No. from sticker on bottom of keyboard: T 081330 85 Stickers on front piece with handwritten notes: "WSUSED 23 Apr. '98" "512k memory, boots OK 12 Jul '01"
Made in Korea
Manuals and software included (item 63)
References: http://www.islandnet.com/~kpolsson/comphist/comp1983apr.htm