Just found that this discussion has been going some time ago. I'll try to make a systemic analysis of what the origins of the ship are.

First : Towards the end of the eighties, the well known Dutch shipping company ordered 3 rather versatile ships, which could deal with containers, general cargo and oil, all carried in centre holds/tanks. The ships were to be build by Van der Giessen at their Krimpen yard. Later three more ships were added to the order book. At time van Nieveldt Goudriaan was at the end of their traditional liner/tramping services, and were not very much involved in container shipping, so they came up with this innovative concept. In the end the concept did not work, the ships were sold and all of them were at one stage converted to chemical tankers. Cranes were removed, but apart from that the were not much visible differences, they remained looking as six identical sister ships, and not much different from the original ships, but now without cranes
The ships involved were
Yard number 944, NORDSUNDET, IMO 8819718, delivered 1989 and converted 2004, (double hull also)
Yard number 945, SKUTSKAR, IMO 8819720, delivered 1989 and converted 2004, (double hull also)
Yard number 946, ALDABI, IMO 8819732, delivered 1990 and converted 2009, reconverted to general cargo in 2019 with cranes and scrapped in 2020
Yard number 947, ALCOR, 8821747, converted in 2002
Yard number 948, ALHENA, 8821759, converted in 2002
yard number 949, ALNATI, 8821761, converted in 2001.

The conversion dates have been sourced from Lloyds data.
After conversion all ships looked the same, and the 944, 945, and 946 were not tampered with any more.

What happened with the other three is shrouded in mystery. Yd 947, 948 and 949, were at some stage converted again and renamed NEPTUNUS, NAUTILUS and NIMBUS. There are no reports about these conversions with Lloyds and also not in Miramar, but comparing the ships before and after this conversion shows two completely different ships, which, in the end might have only shared the original engine room and aft section (hence the same IMO number) and perhaps the hull itself, but everything else had completely changed. If anybody has any information about the timing and the place of this second conversion, let him come forward.

What this means for our category use is that all ships should be considered as CABU's until the date of their conversion, after which they became (chemcial tankers) and should by allocated to the correct age bracket. Only the reconverted ALDABI, and there shots of her on site, should be put the general cargo section.

This ship was originally built (like on photo) as General Cargo/Tanker (Container/oil/bulk - COB ship). Converted to Oil Products Tanker in 2002.

When named NAUTILUS and Swedish-owned, she had a blue and white livery, and the same colouring was given to a new NAUTILUS, IMO 9377183, in 2012.
Some photos of these 2 NAUTILUS' have been mixed on the site but should now be correct, if I didn't miss any.

Cheers,
Aleksi

TALHENA was converted into Chemical tanker in 2002, IMO 8821759.
NAUTILUS' IMO is wrong, should be 9377183.
From Miramar:
[2002 cv to chemical tanker, 4609gt/7030dw] - 91 TALHENA - 96 DALHENA - 01 NAUTILUS - 07 AEGEAN PRINCESS - 16 ECOFIGHTER - 21 SEA EAGLE

Hi Bernd
I did not enter it as a tanker but as a bulk carrier
Gordon

Wrong Imo ,that is not a Tanker
Regards Bernd