This is the Black Knob from manufacturer Bjerg still available.
Previously there was a similar Knob för Skyulights, with a catch to the assenbly. This is no longer available.
Previously there was a similar knob, where the Black knob was more cylinder shaped, with a smaller diameter. This is no longer available.
This is the second generation Latch A : Latch A MK II.
The Black material is today made in durable plastic.
The Bjerg Crown assembly is included in this product.