5th Gen refers to a Radix. At least the 112, so I see the 122 as the same generation. The 122 seemed like it was to appease those who couldn't wait for TVS series, or was that the 122HH. TVS are a 6th gen, both 1900 & 2300.
And most TVS have a checkerboard weave pattern, the Radix had single lines, in most everything I saw. A prototype could be different, not sure Maggie would let a proto get out, who knows tho.

 

Very confusing.

 

It is true that some TVS1900's are silver, and have a J-tube. However, that picture in the ad shows a MP112 unit, not the TVS1900.

 

That Ebay unit looks identical to my TVS1900, 90MM j-tube and all! Look at the top of the blower. The TVS models are flatter on top than the 112-122's.

 

Its used. And it looks like a 112. So that isnt a bad price but not some insane deal either.

 

Just to try clearing up the confusion in this thread....

This is what a TVS1900 with j-tube looks like.


This pic is from the ad in the OP.


The blower from the ad is a pic of a used Radix MP112.

 

The ebay pic is of a MP112. Couple of give always is that is doesn't have the quick change pulley and it has the EVAP solenoid mount on the front of the tub.

 

Thanks for clearing this up for me.