Most closely related (as far as I can tell, although the single-pickup look is certainly more 'Rocket-y') to the Harmony-made H75, 'Our Finest Electric Guitar' said the catalog for better than 3 years. The 1429 was supplanted (in looks at least) by the Bigsby'd 1454 in Spring/Summer '63.
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The 1429 was the top of the electric Silvertone line for the years it was offered. Each switch turned its matching pickup on or off, and you had a volume and tone for each pickup; straightforward and versatile. A lot of players have found memories of this 'finest' guitar from the Sears catalog. A summers worth of grass mowing or babysitting or paper delivery could buy one (early 60s, remember), or maybe, just maybe if you were a good boy or girl, Santa could sling one over his back for December. A favorite on the collector/players market.
Fall/Winter 1959 at $175.00 (What? no $.95 ?!?)
as the 57F01429L
1962 as the 57H1429L at $169.95