Partridge or possibly kempas. Both very similar, very common, but from different continents. Those old cues had wood from all over, so there's no way to really know exactly what it is. Partridge includes a dozen or more similar woods from south America, where kempas is from all over SE Asia. I'm fairly certain it's one of those two, but I wouldn't be able to say which, and definitely couldn't identify it specifically. Partridge is often called pau-rosa, too, which means nothing because that's a common name for pretty much anything hard & brown. Those woods have been used in cues as long as cues have existed, though. I recall seeing it in the latest Valley Supreme cues before they went overseas, and often see it in older Valley house cues.