HP41CV with built-in Time Module

[wilbertschelvis]

Hi all,

I recently bought an HP41CV (Fullnut, #2121Sxxxxx) which seems to have a built-in Time Module. While there are no modules in the 4 slots, the Time Module functions show in the Catalog and they work OK. I cannot find anything about this in all the forums and websites that I know of.

Does anyone recognises this, have a similar HP41CV or maybe some further information?

Gr., Wilbert