It's been a while in the making (mostly due to getting distracted), but here it is, the Ilyushin Il-18D in Sieranavias late 50s-60s livery;
Compared to the previous version of the livery as worn on the Il-14, the late 50s version included the Cormorant logo used in various official documents including the passport stamps (the red faced Cormorant is a national bird and quite common along the coasts). Sieranavia had started using a variation of the Cormorant in internal documents and advertisment posters internationally but the logo was not featured on aircraft until the end of the 1950s.
With the delivery of the Il-18s, Sieranavia had increased reach to send its modern aircraft on some of its most important regional routes. The long range of the aircraft also resulted in it being used for a time in the airlines sole flights to Western airports in Japan, Canada and the United States. Even after their replacement on these premier routes by the Il-62, the Il-18 continued to be supplemented when the faster jets weren't available due to maintenance.
Even after the end of the cold war, the IL-18s remain in Sieranian service.
I'm still not too sure about the font but I feel it looks more appropriate and matching for an airline than what I was using previously.