Question: Alba is a sub-brand of what holding company that makes and sells watches?

Context paragraphs:
Richemont: Compagnie Financière Richemont SA is a Switzerland-based luxury goods holding company founded in 1988 by South African businessman Johann Rupert.  Through its various subsidiaries, Richemont designs, manufactures, distributes and sells premium jewellery, watches, leather goods, writing instruments, firearms, clothing and accessories.  Richemont is publicly traded as CFR on the SIX Swiss Exchange and the JSE Securities Exchange.

CTBC Financial Holding: CTBC Financial Holding Co., Ltd. (Former: Chinatrust Financial Holding Company Ltd.) is a holding company principally engaged in the finance industry through its eight major subsidiaries.  Assets — $115.7 billion (2015).  The holding company is based in CTBC Financial Park, Taipei, Taiwan.

Seiko: Seiko Holdings Corporation (セイコーホールディングス株式会社 , Seikō Hōrudingusu Kabushiki-gaisha ) (), more commonly known simply as Seiko ( ), is a Japanese holding company that holds subsidiaries which manufactures and sells watches, clocks, electronic devices, semiconductors, jewelries, and optical products.

Stührling: Stührling is an American company founded in 1999 in New York that designs and sells watches and their accessories.

Watchmaker: A watchmaker is an artisan who makes and repairs watches.  Since a majority of watches are now factory made, most modern watchmakers only repair watches.  However, originally they were master craftsmen who built watches, including all their parts, by hand.  Modern watchmakers, when required to repair older watches, for which replacement parts may not be available, must have fabrication skills, and can typically manufacture replacements for many of the parts found in a watch.  The term clockmaker refers to an equivalent occupation specializing in clocks.

Vestal Watches: Vestal is a privately held company that designs, develops and manufactures unique watches predicated on image and style.  Vestal sells watches and clothes under its own name and by making watches for other brands, including Paul Frank, Vans and singer Gwen Stefani's Lamb and Harajuku Lovers.

Alba (watch): Alba is a sub-brand of Seiko Watch Corporation that produces a line of wristwatches.  It first appeared in 1979.  Using Seiko's own family of movements but with modern styling designed to appeal especially to younger customers, Alba watches are primarily aimed at Asian markets in the hope of creating long-term loyalty to the Seiko group as these customers' purchasing power increases.  Many of its cleaner designs also appeal to current traditionalist consumers.

Modify Watches: Modify Watches is an American retailer of customizable modular watches.  Founded in 2010, Modify Watches sells its own designs in addition to sport licensed watches including MLB, NBA, MLS and NHL.  Modify Watches also produced fully customized designs for companies like Google, Facebook, LinkedIn, Wired, Nike, Pinarello, SRAM, Cartoon Network, SEGA, Bethesda Softworks and adult swim.

Enterprise Holdings: Enterprise Holdings, Inc. is an American holding company headquartered in Clayton, Missouri.  It is the parent company of car rental companies Enterprise Rent-A-Car, National Car Rental, Alamo Rent a Car, and Enterprise CarShare.  The holding company was formed in 2009 as a result of Enterprise Rent-A-Car's 2007 acquisition of Vanguard Automotive Group, the parent company of National Car Rental and Alamo Rent a Car.  Enterprise ranks as the largest car rental company in the United States.  The company sells its used cars through Enterprise Car Sales.  It is owned by the Taylor family

Kingdom Holding Company: The Kingdom Holding Company (Arabic: شركة المملكة القابضة‎ ‎ ) is a Saudi conglomerate holding company based in Riyadh.  The Kingdom Holding Company (KHC) is a publicly listed company on the Tadawul (Saudi Stock Exchange).  The KHC consists of a select team of experienced investment specialists directed by its founder and chairman, HRH Prince Alwaleed bin Talal and Chief Executive Officer, Eng.  Talal Ibrahim Al Maiman.  The company describes itself as a diversified investment company, whose main interests are financial services, real estate, tourism and hospitality, media, entertainment, petrochemicals, aviation and technology.

Supporting paragraphs: Alba (watch) Seiko
Answer: Seiko