- 1 (May-June 1972) "Vol.21 #5" #160"
- 2 (July-August 1972) "Vol.21 #6" "#161" ukL 3.95
- 2 (July-August 1972) "Vol.21 #6" "#161" (front cover creased open to c. 30 degrees from c. 0.5" from base of spine to top by spine, & c. 1" long across top fly corner, pages browning from edges, else fair) ukL 1.25
- 3 (September-October 1972) "Vol.21 #7" "#162" ukL 3.95
- 3 (September-October 1972) "Vol.21 #7" "#162" (pages browning from edges, else fair) ukL 1.95
- 4 (November-December 1972) "Vol.21 #8" "#163" (front & back covers creased c. 0.5" from spine, front cover creased open to c 80 degrees at spine, smaller creases; pages browning from edges; poor-rco) ukL 0.25
- 5 (January-February 1973) "Vol.21 #9" "#164" (c. 0.5" quarter-circular dent c. 2" from top fly corner front cover, pages browning from edges, else good) ukL 3.95
- 6 (March-April 1973) "Vol.21 #10" "#165"
- 7 (May-June 1973) "Vol.21 #11" "#166" (c. 2.5" light crease to top fly corner back cover, roughly parallel to top edge, pages browning from edges, else good) ukL 3.95
- 8 (July-August 1973) "Vol.21 #12" "#167"
- 9 (September-October 1973) "Vol.22 #1" "#168" (pages browning from edges, else good) ukL 3.95
- 11 (November-December 1973) "Vol.22 #2" "#169"
- 1 (January-February 1974) "Vol.22 #3" "#170" (last issue with Ejler Jakobsson listed as editor)
- 13 (March-April 1974) "Vol.22 #4" "#171" (first issue with James P. Baen listed as editor)
- 3 (May-June 1974) "Vol.22 #5" "#172"
- 4 (July-August 1974) "Vol.22 #6" "#173"
- 5 (September-October 1974) "Vol.22 #7" "#174"
probably the last bre issue
- [?#6? ?#16? ?#17?] (November-December 1974) "Vol.22 #8" "#175"
i do not yet know whether this last issue of If saw a Tandem Books bre at all;
i did not receive my own subscription copy before Tandem Books Ltd. closed down their bre magazine operation, and possibly severed the last of their links with Universal Publishing & Distribution; i was sent it (and my last subscription copies of Galaxy) from UPD in New York when i wrote to complain; Arnold E. Abramson bothered to pen & sign an apology on the accompanying compliments slip, which i appreciated. (i started carrying in Single Step in Lancaster, Easter 1975, and distributed copies into Palatine Newsagents, Dave Britton's variously-named porno, SF, fantasy & horror shops & Grass Roots Bookshop (all in Manchester), partly because of his courtesy.)
it did not show up as a bre when the remnant copies (of both of their bre magazines) were remaindered, either.
Tim Kirk's cover for Richard E. Geis' Science Fiction Revier/The Alien Critic, of [i presume Alter] offering flowers on If's grave, sticks in my memory yet...
the title, "[Worlds of] If, was incorporated into that of Galaxy, which i believe both protected ownership of the title, and allowed If subscribers who did not opt out to have the balance of their subscriptions fulfilled with copies of this, also/very shortly edited by James P. Baen until he was hired back by Ace Books to rejuvenate their SF publishing (and set up & edit the SF paperback-zine, Destinies).