Mix up Seiko 7606-7982 WTF !!

Its really weird, yesterday i got this Seiko from a friend, i didnt check out the movements
when i open the backcase, it said 7606-7982, but the movement using 7619A, why on earth it fits ??!!
i mean its really fits, overall the steel in a good conditions, no baret on backcase.

I check website, this is how it looks.
this is from the internet 7606-7982

Note : if someone wanna buy this mix up Seiko, let me know
Dial nya sudah teroksidasi, running all well.
Price : via wassap, Please no SMS

Nofa Akzar - Indonesia (Jakarta)
Mobile. +62812 1224 3090
Blackberry Pin. 296B8CBD.