A short while back, i bought a spherical SBMV lamp from Philips at a local scrap/recycling company.
The etch is ML160. The wrapper says MLL160. But that other number (57...) that's on there, corresponds with what's on the lamp.

I'm now confused. Do i have the lamp with the fluorescent coating or not? It does not appear fluorescent - i can't see a hint of the red or pink color i know from normal coated MV lamps, neither do i see phosphor spectrum lines when looking through a spectroscope, only the ones from mercury and the incandescent continuum. The etch on the bulb also corresponds with non-fluorescent ones. But the wrapper does seem somewhat original to the lamp. I did not see any other lamps or wrappers in the heap of bulbs that i pulled this one from.

The lamp works well and gives a very interesting kind of light. It's cool white but it's also a bit 'off'. Most definitely a much 'worse' color than from my 1970s or 80s MLR160, which gives a highly pleasant kind of light.

Interesting one?, I’ve got the 160 watt MBT/U from Philips and I think you have the frosted version similar to mine?, not sure why they changed the nomenclature though?

ML is just mixed light, MLL is mixed light but with phosphor coating. But later MLs are called just 'ML' again, despite now coming standard with the phosphor coating.
And this one? It appears to be just frosted. But then again, that 57 number is identical to the wrapper, which theoretically could be accidentally switched around but that would also be highly unlikely...

I think you have what would be called in Britain an MBTL lamp, where the L does not mean Luminescent (ie phosphor) but instead is a simple light diffusing coating of silica powder, as used on incandescent lamps to produce a more diffuse light.

In the British Philips catalogues they listed three types of 160W :  MBT with frosted bulb, MBTL with frosting+silica, and MBTF with frosting+phosphor.  It seems the Dutch nomenclature did not cater for all those variants, hence the confusion even within Philips’ own factories.  I also have one such Philips lamp with conflicting etch.

For a short time there was a variant called Philips MLL-N available. Never seen one in person though. All of them I have are ML and one MLL.