...bearing in mind that the era of this Perry Mason episode (1966) had Hollywood studios using Italians and Latinos to portray Native Americans...the general viewing public's kniwkedge if real Russian accents was primitive, or non-existant (ue. The voice of Mel Blanc in the cartoon " Boris and Natasha" on the "Rocky and Bullwinkle Show"...
...Virginia Field, born in London to a Vienna and Paris educated father and King's Counsel ( our Federal Prosecutor) St. John Field and her mother, a cousin of Confederate Army General Robert E. Lee (hence the name, "Virginia") ...was often given roles portraying Eastern European- types...her accent is as phony as counterfeit diamonds in her Czarina's long-lost tiara...
...on the contrary Leonid Kinskey WAS raised in St. Petersburg, and his accent is correct and true as Vyacheslav Gerzov, the Russian commoner/circus performer who claims his mother carried the tiara out of Russia during the Bolshevic Revolution..
...but the most glaring goof involves Hollywood-born Carlos Romero...who had dozens of roles portraying Latino characters...in this episode, he potrays Ricardo Arena, a Brasilia businessman ..who repeatedly speaks Spanish...NOT Portuguese, the official language of Brazil...
...while certainly not a noticable flaw at the time...such inconsistencies would render the entire episode absurd by current standards...
...this was amongst the final episodes of the Perry Mason series; and CBS obviously just wanted to "get it in the can"...