B&L brass projection triple lens test

One of the lenses I picked up over the past Winter was a 12" (300mm) Bausch and Lomb brass projection lens.  It came off a B&L Balopticon Model C Magic Lantern slide projector from around 1915.  It doesn't come apart so I couldn't check the lens configuration more closely but most of these lenses were of a Triplet design with no aperture iris.  My starting guess for the true aperture of this lens is around F6.7 which is what one of my other projection lenses, a 15" (380mm) off a Balopticon has as its aperture.

This scene is from one of the White Birch Tree forests at the Marion Brooks Natural Area in Elk County, Pennsylvania. 

Technical details:
1947 Pacemaker Speed Graphic 4x5 large format film camera. 
12" Bausch & Lomb brass projection triplet lens used with focal plane shutter of Speed Graphic. 
Ilford FP4+ B&W film, shot at ISO 125.
1/500th second at F6.7(ish).
Developed in Adox Rodinal 1:50 dilution for 12 minutes @ 20 degrees Celsius in Jobo Multitank 5 with 2509N sheet film reels with drum placed on Unicolor Uniroller 352 auto-reversing rotary base. 
4x5" negative scanned with Epson V600.