A special preview screening for the movie 3688, a four-day trip to Perth, and Casio selfie cameras are some of the prizes up for grabs for The Straits Times readers from today.

The three treats are part of The Straits Times' 170th anniversary "Longest Thank You" giveaway.

The ST has been giving out prizes to readers in batches throughout the year, including flights to London to see pop singer Taylor Swift in concert, dinner for two at the Joel Robuchon French restaurant at Resorts World Sentosa, a trip for two to Club Med Maldives, Samsung Galaxy phones and Ball watches.

More than 197,100 readers have taken part in the ST170 treats giveaway since it was launched in March, with over 64,600 entries for the top prize of a brand-new Land Rover Discovery Sport.

In the latest giveaway, 100 readers stand to win a pair of movie tickets to the preview screening of 3688.

The film, set in the 1980s, centres on a parking attendant who dreams of becoming a singer like her namesake and idol Fong Fei Fei. It features everyday heroes, such as taxi drivers, coffee-shop workers and "summons aunties".

There is also a post-movie dialogue with director Royston Tan and stars Shigga Shay and Joi Chua, facilitated by ST's movie critic John Lui.

Also up for grabs is a trip for two to Swan Valley in Perth, Australia, worth $3,000. The prize includes a three-night accommodation at the Novotel Vines Resort and Country Club, two tickets to the Entwined Festival, and return economy flight on Singapore Airlines.

Four readers will also stand to win a Casio EXILIM EX-MR1 selfie camera, worth $429, each. The 133g compact digital camera has a front-facing mirror to optimise self-portraits, and is ergonomically designed.

To take part in the lucky draw, visit 1845.straitstimes.com for details.

The grand draw for the Land Rover Discovery Sport will be held at The Straits Times Run on Sept 27.