These planes were obviously manufactured to shape the design in the windows of that era. They are first seen in the 1862 Cat. where are listed: Lamb’s Tongue Sash; Ovolo Sash and Astragal & Hollow Sash. No images shown. By 1873 the planes have been numbered: #858 Astragal & Hollow; #861 Lamb’s Tongue; #883 Gothic [new addition] and #890 Oveloe. The numbers were changed again[!] in 1897: #1057 Rustic Sash [new addition]; #1058 Oval Sash; #1062 Gothic Oval; #1063 Lamb’s Tongue Sash and #1065 Astragal and Hollow Sash. By 1909 we have again another re-numbered system and these planes are now: #3041 Ovaloe Sash; #3044 Rustic Sash; #3045 Gothic Sash; #3046 Lamb’s Tongue Sash and #3047 Astragal and Hollow Sash.
In 1921 only the #3041 was available as was the case in 1928. But by 1938 all of the Shamrock Sash Planes had been de-listed. It should be said here that from 1897 -1909 there were listed planes as above but described as being ‘to Stick and Rabbet, with 2 Irons’. These double-iron planes were ideal for window sash, cutting both the filleted Ovolo [or other shape] and accompanying rabbet. Below is the excerpt from the MARPLES 1909 Catalogue.
Above you will see that Brass-end Templets were available for all the different Sash shapes. Below is one of the Templets.