Beer engine knowledge required

[JABB]

As I see it, there are two types of engine spout. One is the common swan neck and the other a flick tap straight one.
If I was to search for the latter, how would I accurately describe it?
There was one on Ebay a couple of months ago which didn't sell and I would like it, but can't find it.

 

[jonnymorris]

Not sure I entirely understand the question... could you be talking about a dalex tap?

Like these...
Censored
Sorry a bit to Naughty

 

[JABB]

Not quite!
This is what I mean.

 

[wkel50]

traditional brass rollover taps

http://www.harrymason.co.uk