The phrase "a collection which was" is correct and usable in written English.
It can be used when referring to a specific collection that existed or was created in the past.
Example: "The museum displayed a collection which was curated from various historical artifacts."
Alternatives: "a collection that was" or "a collection previously".
The small-scale presentation emphasised the power of a collection which was more punchy than in previous seasons.
The queen bee and her hive were the starting points for a collection which was, as is right and proper at McQueen, tempting as honey but with a deadly sting.
"See now buy now" may be revolutionising the fashion industry, but it is still largely an abstract concept for the consumer – or it was until Topshop, the spiritual home of instant retail gratification, tackled that head-on with a collection which was on sale at a pop-up shop at the end of the catwalk as soon as the show at Spitalfields Market ended.
Danish designer Astrid Andersen returned this season with a collection which was at once delicate, masculine, razor sharp and relaxed.
This is a collection which is by turns tender, provocative, surprising and, in its own way, political.
"An embarrassment", "cheesy and dated", and "truly, deeply horrible" were among the critical verdicts on a collection which is chiefly remembered for heart-shaped nipple tassles.
Leon said, "We wanted to see how we could bring up climate change in a collection, which isn't super easy".
The records of the budget office, beginning in 1908 (though lacking years 1927-1965), are a collection which is continually maintained.
The records of the budget office, beginning in 1908 (though lacking years 1927-1965), are a collection which is continually maintained; when they are sent to the Archives they are added to this collection.
Though Sketches of Spam is a genre traversing song-cycle which simultaneously embraces and deconstructs folk, jazz, fusion, ambient, drum 'n' bass, metal, funk, punk, blues, and every permutation thereof - and many of which have yet to be tagged - Cataldi's diverse compositions hang together as a collection, which is a rare feat in any generation of modern recorded music.
In 1970, he began collecting rare books, amassing a significant collection which was sold at auction at Christies in 1992.
