Estey installed an organ [here] in 1904, and when the church was enlarged 4 years later a new organ was purchased from Felgemaker. It's odd that the Estey wasn't just enlarged. However, the Welch family (as in grape juice) were bankrolling it, and their son was evidently a very good organist. I've seen references to him playing services and recitals in Western NY in the 1910s-40s. You can also tell from the Estey opus number that it appears to be solidly among others performed in 1904 [ed.: year confirmed with Estey Opus List]...perhaps the young Mr. Welch had a hand in telling his parents they needed something grander!
-- information from an email from Andrew Henderson, 2025-03-04

Installed at a cost of $5,000. From the Westfield Republican (April 22, 1908): "The organ, with its massive case of quartered oak, and surmounted by groups of gold pipes, is in every way worthy of the church in which it stands. It is the most imposing feature of the furnishing. The entire action of the organ is tubular pneumatic and is constructed upon a novel and very perfect principle, which insures a wonderful quickness of response and rapidity of repetition, together with a very light and pleasing touch. The arrangement of registers and couplers embraces all the latest ideas in these useful accessories. No trackers, squares, or mechanical connections are used and consequently there is nothing to be affected by atmospheric changes."

This instrument and electrified n 1928, with a new choir division and 3-manual console installed in 1952.