Jaeger-LeCoultre have made many different Memovox version, but as far as I am aware, only two Memovox International!
Yes, there were several LeCoultre Memovox WorldTimer or International, but Jaeger-LeCoultre so far only made two.
First one as part of the 125 Years Jubilé Collection back in 1958 and the second one in 2010 as a Limited Edition of the Master Memovox re-introduction into the Master line.
One manual, no date, 35 mm and with the world cities in a circular pattern.
One automatic, date, 40 mm and with the world cities in a radiant pattern.
Over 60 years apart, but still with a lot of common DNA!