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3-inch CRTs and are mechanically similar to early 500-series monolithic scopes such as the 511A. | 3-inch CRTs and are mechanically similar to early 500-series monolithic scopes such as the 511A. | ||
The scope slides out of the case instead of having removable side covers as were used in the 53x, | The scope slides out of the case instead of having removable side covers as were used in the 53x, | ||
54x, 55x, 56x, 57x, and 58x designs. What is the difference between the 315 and the 315D? | 54x, 55x, 56x, 57x, and 58x designs. What is the difference between the 315 and the 315D? Were | ||
any 315 scopes made, or only 315D? | |||