Obviously 4 crew of no autoloader.
Not obvious, very much so.
1 - D-81 family(2a26 and on) is very unsuitable for human loader, it's a major redesign for not much reason.
2 - DPRK had a license and access to T-72 family tanks. They couldn't get a full ToT in time like they did with T-62 (Soviet Union collapsed), but reverse-engineering a carousel loader isn't magic. China did it (twice), Iran did it.
3 - Songun doesn't have periscopes associated with loader. Moreover, its sight setup broadly matches traditional 3rd gen Soviet crew seating(i.e. again T-72).