As promised, here is a longer answer.
March riflescopes are a brand of scopes designed and manufactured by the Japanese company called Deon Optical Design corporation. It is celebrating its 15th year right now and they have built and moved into a new factory building. Their official website is www.marchscopes.com.
You can read their story as the site is replete with information.
They have designed and built various models over this time, and you can see the evolution of the various designs over that time frame. Their current line-up is very impressive. From best in class LPVOs, as exemplified by the March 1-10X24 with dual reticle to the March-X 8-80X56 (Second Focal Plane) and the March Genesis 6-60X56 (First Focal Plane with 118mil adjustmenr range), they have the most innovative designs, with the top-notch manufacturing to deliver these products.
I have learned a great deal about their products, the company, and its people over the last 6 years. They have invited me to attend SHOT show in their booth in 2018-2020. There was no SHOT show in 2021 and this year, they only have a static display because of travel restrictions from Japan. They have already asked me to be in their booth in 2023. I do not work for Deon/March. I do not sell scopes. I am just a HUGE fan of their products, I am a competitive shooter, and I know a little bit about optics.
March scopes were the first ones anywhere to feature ED-glass in riflescopes. They started that almost from the beginning of their history. In fact, all March scopes have ED glass elements except for a few models. The LPVOs with 24mm objectives have non-ED glass. The others that do not have ED glass, instead have Super-ED glass, and again, March is the first anywhere to have Super-ED glass and currently still the only ones. Before you pooh-pooh ED and Super-ED glass as "marketing fluff," don't. Just don't, it's a real thing. I'm happy to discuss it, but in another post.
The March 1.5-15X42 that you asked about is an innovative design with a huge objective lens in a 1.5X base magnification. I have one mounted on a competition-grade AR-15. I love the range of magnification, as an all-around optic. When I got mine about 18 months ago, I noticed that the objective lens group appeared to be a new design. It certainly has a little heft to it. I have since discovered that my suspicions were correct and learned a bit about the reasons for the new design. At the low end of magnifications, this is one impressive riflescope.
March scopes are all hand-made in Japan by Deon, now at that new factory. The bodies are made from a solid ingot of aluminum (not the 6061 or 7075 junk, better stuff,) and machined down to the proper shape. No extrusion, no multi-piece. Everything in the scope is top quality all-Japanese parts. (There is not China crap in there anywhere.) The scope bodies are filled with argon, not nitrogen, for longer life. Everything about these scopes is designed and built for long life.
The warranty is 10 years, because of Japanese law, but they will support you beyond that time. I have several March scopes and have had March for almost 10 years now. I have never had a problem with any of them.
March scopes are usually built to order because they have so many options and features, but some dealers have some of the most popular models in stock. It usually takes two months to get the exact model you want with the specific features (reticle, knobs) that you want.
If you have specific questions about a certain model, post it here. I'm sure someone can answer.