Window handle with spring suits Comalco Wunderlich 1C series sliding windows.
Replacement spring is 5-1500 .
For key lockable version see Rollerco part 5-1140.
* Section 5 - Window Catches, Locks & Fittings
Sliding window catch & spring suits MTM and old Adelaide Windows. Part 5-1981 and 5-1980 are a direct replacement for this item.