Daren, that's a hard question for me to answer because, as far as the electrical specifications are concerned (and assuming the ones I found are correct ;--) the Cello is more like a Miyabi.
But you say it doesn't have a cantilever, and it weighs 13gm about the same as an Ikeda. I'd go with Ikeda. Why don't you e-mail Ikeda-san? Maybe attach a pic of your cartridge for him to identify? Write to these people, they are apparently the only contact for Ikeda-san:
http://www.schopper.ch/static/contact/index.html
.
But you say it doesn't have a cantilever, and it weighs 13gm about the same as an Ikeda. I'd go with Ikeda. Why don't you e-mail Ikeda-san? Maybe attach a pic of your cartridge for him to identify? Write to these people, they are apparently the only contact for Ikeda-san:
http://www.schopper.ch/static/contact/index.html
.