Hey all, I just picked up a seiko h556-5050 from an antiques store but it needs a new battery. l’ve read it needs a 370 battery but I can’t seem to find anywhere to buy one, are they discontinued now or something? l’ve found a place that sells 371 but I read those are low drain, so not ideal for an ana-digi with chrono and alarm. Is there an equivalent to a 370 battery I can use? TIA