Whats the model name of this Zenith Porthole

[Microtrol]

Hi all, got lucky and picked up another zenith porthole in a mahogany finish. It uses the 24H20 dual chassis and is marked on the cabinet as H2439R. It has a Curtis replacement crt (16gp4) that tests very good. Looked around the web and could not find it's model name and just curious if any one here might know it. It's model number is listed on my sams for my H2437E unit. It is not listed on the TVHistory site but looks like the cabinet that the monroe used. Anyways, if anyone has any info it would be appreciated. Ps my other porthole is a Fielding with a maple finish.