D2t+

Notation
Nautilus 1LLL
LL Diamonds / D2
Match the case drawing, including the side colours and the pieces already solved; hold the puzzle as drawn.
Your status
Recognition & spaced review

Algorithms (2)

(R) first, then:
R' L' R' L R Lw R' Lw B L' B' L Lw' R Lw'
My choice
15 HTM · 15 STM · 15 QTM
3-gen
rotationless
<R,L,B>
Do R first on the case as drawn. · Cubemuch
(R) first, then:
R' U' R L F L' R' U R' L F L' U' L F' L'
16 HTM · 16 STM · 16 QTM
rotationless
<U,R,F,L>
Do R first on the case as drawn. · Cubemuch

How this case is verified

The source's case image defines this case; its setup is reconstructed and checked against that independent pattern. Setup: R' L F L' U L F' L' R U' R L F' L' R' U R R'. Every algorithm above was run by our logic engine from that state and reaches "solved-up-to-r".