They must have been fairly prolific; in my entry for them I have a reasonably long list of items on which I have seen their marks. They seem to have been in business during the first 2 decades of the 20th century and don’t appear in the telephone directory after 1923.
As this trophy was used in Malaya, could it be that it was brought to Malaya preww2 and remained unsold at the shop until it was purchased in the 1950s or produced in 1911 but only shipped to Malaya after ww2. If it is the former then it would have been amazing to have survived the horrendous Japanese Occupation 1942 to 1945 when anything made from precious metals would surely be looted or sold off and melted to secure funds for much needed inflation ravaged food.
I’m afraid that your guess is as good as mine. The ones I have seen in the United Kingdom would generally appear to have been purchased secondhand, either without engraving or may have had it removed. I have seen a large Elkington trophy with a hallmark for 1878 (iirc) which was bought by subscription in 1948 and remains in use to this day. If yours was a sports trophy, from my limited experience I would guess that it was sourced in the UK and shipped out to Malaya. But as I said, it really is guesswork.