(latterly known as the Mark I) ~ and its successor - the Mark II
Below, the falling block and the extractor / ejector
lever can clearly be seen. The large slotted srew to the left side of the action
is the locking screw for the dovetail
on which the Parker-Hale PH25
rear-sight mounts, permitting fore and aft adjustment. The original issue
PH25 sights were just 4 clicks to the minute adjustment. The later rifles were
fitted with PH 25A through E rear-sights with 8-click to the minute adjustment.
Many of the "Mark I" rifles were understandably retro-fitted, by their
owners, with the finer adjustment sights. The knurling on the rear of the action,
under the eyepiece, is a non-slip thumb contact area for the "thumb-up"
hand hold position. The groove just visible on the centre-line, below the knurling,
is the cut-out for the aperture through which a barrel cleaning rod can be passed.
The groove is continued back into the comb on the raised cheek-piece of the
butt-stock. The standard comb height was too high to otherwise permit a clear
run for the rod.
original production International, trigger
adjustment could only be achieved by removal of the action - a simple task
involving only the unscrewing of the action locking pin with its large diameter
knurled knob. However, whilst it is possible to access the three adjustment
screws without removal of the falling block ( a workshop job, since the extractor
lever bears back hard against the front of the falling block, with its considerable
leaf-spring pressure, and itself needs to be removed before the fulcrum for
the block can be driven out) one -drag adjustment - is accessed with a small
but long allen-key through a hole in the lower face of the extractor lever,
the second small and the third larger - vertically orientated - screws, respectively
the central and smaller of which is the backlash adjustment and the third
front screw bearing on the trigger's tensioning leaf spring for weight adjustment,
are less than a half inch under the falling block and require short cranked
allen-keys. This design was not conducive
to quick adjustment on the range, and the modification, carried by the Mark
II rifle to put the weight and travel adjustment screws into the front of
the trigger-guard accessible externally from below, was also available as
a factory retro-fit for the owners of first production "Mark I"
rifles. This modification, and the addition of the notation "MK II"
in place of the original marking " .22 RF ", were the only
externally visible differences between the two Marks of standard rifle.


BSA International Mk.II - LHS .............................................and underside forward of the action showing trigger adjustment screws in the trigger guard


Below: the fore-end removed. It is held by only one screw into the underside of the barrel, thus transferring the sling load directly to the barrel. This was altered on the subsequent Mark III rifle, which was effectively a fully-floating barrel arrangement.
Below: a two page contemporary advertisement for the Mk.II rifle.


Supplied with each new rifle, in addition to the maintenance pamphlet ................................................
............................(do you by any chance have one available for copying here?) ......................................
............................................................................. was this folding card relating to the Parker-Hale sights supplied as standard.
The later Mk.III rifle had an improved Model 25 rearsight with one-eighth minute clicks
instead of the one-quarter minute clicks of the Mk.I and Mk.II rifles' sights shown on this page.

We also show the parts drawing of the Century as illustrated in the contemporary BSA Spare Parts List
Click on the image to view the original sized drawing
and the associated key tables showing the parts and their contemporary pricing in Pounds Sterling ( with shillings and pence as prior to 1971 decimalisation).


Quite apart from ongoing use, in original form, in historic competition,
it can be seen below that a Martini International Mk.II's day is never done!

The above rifle has recently been modified for benchrest use.....................
....................... visit WWW.BENCHREST22.ORG
Or see the "bull-barrelled" Mk.V shown on the page for the Internationals Mks IV & V.