I have a new, never used Dorma door closer. The model # is 7605 which Dorma said they have discontinued but is replaced by the Dorma 8616 (see dorma.com web site for all the details). I believe the one I have has similar functionality, but it looks like the new design may be slimmer, etc.
The retail price from Dorma for this closer is $320 per customer service and can be bought thru distributors.
Selling the older model for $75 which is a terrific deal. It has all the instructions, hardware, etc. as it is in the original box. As I said, this is new, never used.