Fawcett Gold Medal
Ten Tomorrows - edited by Roger Elwood. An original anthology - all stories new to this 1973 paperback. No award nominees - but the lineup of authors is quite impressive. I'll recommend the Silverberg story as a good example of his work when he was creatively "on fire," and the Niven novelet is the second to feature "Gil the ARM."
"Ms. Found in an Abandoned Time Machine" by Robert Silverberg