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Explicit manufacturer interchange
Sterling Electric 133/2133AQ appears in the same manufacturer-published cross-reference row as Falk Omnibox 1133WQM at Match installed ratio · 1.33 in center distance.
Sterling Electric explicitly marks the listed competitor models "Yes" for interchange with 133/2133AQ at 1.33 in center distance in its 2000RA Style AQ Interchange Guide. Rows marked No are intentionally excluded.
The manufacturer explicitly marks the compared model as an interchange in its published table.
Falk Omnibox 1133WQM and Sterling Electric 133/2133AQ are tied by the published source at Match installed ratio · 1.33 in center distance.
Still verify the exact configured ratio, input/output interfaces, duty, accessories, and installation conditions.