JSB Alstalux AZ1281, lit

Recently I finally added a bulkhead I had been wanting for a while to the collection. This JSB Alstalux AZ1281 was a lucky find, and comes complete and brand new, with its box and a Thorn 2D lamp. The bulkhead is the largest of the two sizes, and I was rather surprised by it, measuring at 380mm, bigger than my Coughtrie CPS48, at 368mm. The Thorn lamp is a worker, as expected, however for lit pics I used a Sylvania, to try and preserve this elusive lamp.
The refractors here are very tight and concentrated, the exterior features concentric rings of refractors without break all the way to the centre, whilst the inside features refractors that beam outwards from the centre, broken by concentric rings. As you can see here when lit, working together when lit they do an incredible job of breaking the shape of the lamp, almost completely, even going as far as making it look like theres two lamps fitted.