457x

: The "Euro-Sled" nickname comes from its low, sleek profile and the horizontal lines that resemble a sled or a high-speed locomotive from the period.

: This specific model was produced by the Sparks-Worthington Company of Jackson, Michigan, primarily for the European market, making it significantly rarer than domestic Sparton models. 🔭 Secondary Technical Meanings : The "Euro-Sled" nickname comes from its low,

Depending on the context, "457x" can also refer to specific technical or scientific markers: 1. Astronomy Magnification primarily for the European market