Almost perfect (01.2009) with Ilford HP5 400
...but as you can see, the Yashica Mat viewfinder doesn't sport 100% frame coverage.
Belgium, early morning
Ilford HP5 Plus 400 pushed to 1600 and developed in Kodak D-76 1+1, 17.5 min, 20°C. Agitation: whole first minute, then 10 seconds every 2 minutes.