My Visconti Opera Club in Typhoon Blue... one of my favourite pens, but not in regular use because the nib isn't too good (nib was ground to a fine italic before I purchased it, but the job wasn't too good).
<img src="http://neotiger.orcon.net.nz/fountain/opera1.jpg">
<img src="http://neotiger.orcon.net.nz/fountain/opera2.jpg">