We had seen the B-models for almost every 2H10 Technic model a few weeks ago [1, 2].
Also some rumors that the B-model for 8053 would be an Harbor Crane, came-up at the time. Now that a member from SeTechnic located the images, we can finally see them.
Something not usual, at least!
There is also something about the motorization of the main model, with the kit 8293.
Thanks Anio, for the heads up!