Sorry, must've glitched. What's your reply? Still think that pic's off—RCA datasheets are gospel for 35W4 pins. Heaters def on 2/7, not 3/4.
Discussion
The GE specification sheet disagrees with you. So does the 1972 ARRL handbook, found in this link: https://www.radiomuseum.org/tubes/tube_35w4.html