← The parts desk
LOOK-ALIKE PARTS / SPEC COMPARISON
S1088 vs. S1088
Treat these as non-interchangeable. These operators cover the same Pella window vintages but the retailer specifies distinct left and right variants.
| Specification | S1088 | S1088 |
|---|---|---|
| Mechanism / profile | Casement operator | Casement operator |
| Hand | Left | Right |
| Window vintage | Architect Designer 1993–1999; ProLine 1991–2000 | Architect Designer 1993–1999; ProLine 1991–2000 |
| Fitment | Pella Architect Designer 1993–1999; ProLine 1991–2000. | Pella Architect Designer 1993–1999; ProLine 1991–2000. |
| Original source | Check source ↗ | Check source ↗ |
The interchangeability warning is an editorial conclusion from the documented differences above. Always check the supplier’s current drawing and your original part.