Obviously, oversized replica watches have become the fashion trend for the last decade or two. Even for our Rolex, the most stubborn traditionalists, being forced to announce the new and updated styles that beyond their time-honored 40mm dimensions far away.
Bigger has always equaled better in the world of Panerai, for example, the Luminor Submersible is their wonderfully robust diver, being already available in 44mm and 47mm versions.
There is no doubt that it is one of the most famous watch series worldwide,with its iconic bridge-style crown guard, and easily among the coolest, Paneristi have often found themselves sidelined by the oversized proportions.
For those blessed with the forearms just like Sylvester Stallone, the patron saint of Panerai, a 44mm or 47mm slab of steel on the wrist looks quite comfortable while for those of us with a more modest musculature, it was just a little, or far too much. 
At last year’s SIHH event, Panerai unveiled the answer to every non-Rambo’s dream when they announced a freshly scaled down 42mm edition of their Sub. While it may not sound like a lot, losing two millimeters off the midsize or a full half centimeter off the largest version makes a big difference to the whole look of the model.
Available in steel (expensive) or rose gold (crippling), it brings the audience a whole new and appreciative appearance. While it may not be the first 42mm piece Panerai have made, it is the first Submersible in that size and therefore, the first one you could wear under a shirt sleeve realistically.
Followed the pattern of many other manufacturers including Breitling and Omega among last year, Panerai finally has offered smaller versions of established marques.
Except the more all-inclusive size, nothing much else has changed. The dial is still as legible as they get, with large round indexes and batons at the 12 and 6. They are filled with a large of lume, as are the tips of the two skeletonized main hands. On the steel version, the sub dial at nine o’clock is given a little pop of color with a bright blue sweep seconds hand replica watches, lacking of magnifying lens over the date window at three o’clock which is a small difference from the 42mm model.
Compared with other siblings, it is obviously thinner at just 14.5mm, and is equipped with the Panerai manufacture P.9010, which itself is slimmer than the previous P.9000 caliber by nearly two millimeters. The automatic movement has a 4Hz frequency and features a new balance bridge which is secured at both ends, along with a twin barrel to make sure three days power reserve.
The steel PAM 682 Acciaio has a brushed, satin finish to its case, bezel and clasp which is echoed across on to the hands. It provides an excellent contrast in any lighting conditions, specially against the matte dial, and the water resistant reaches to 300m.
The rose gold, or Oro Rosso PAM 684, is only rated down to 100m which would fit you to dive at the first time, is equally readable and has the added gorgeous of a ceramic bezel. The surround on both models is perfectly weighted and sounds great on its 60 click rotation as what you expect. 
Another element which remains the same is all-important Panerai bracelets can be changed easily. Both versions come supplied with a 22mm black Caoutchouc rubber strap, bellowed for diving and with a channel down the middle on the underside to help keep the air flowing in hot weather. But the Paneristi love nothing more than varying their look by fitting different straps, and the new Subs keep the feature from their larger stable mates which is quick changed straps. Pressing a tiny button under the lugs on each side, and using a pusher tool to nudge the bar out through the drilled lug holes, making bracelets can be swapped out highly quick and easy, without the risk of scratching the case.
The 42mm Luminor Submersibles are niche versions of an already quite niche replica watch from Panerai. Though they are not enough big and rugged for traditionalists, however they offer a far more available option to someone who are eager to own a timepiece of Panerai collection but have small wrist. Thus there was potential market of the new modes in some point.
The truth is, both models remain reassuringly expensive. The steel PAM 682 retails at a Rolex Submariner-bating $8,700 while the red gold counterpart comes in $26,700 surprisingly. For those who can afford them it’s not a difficult choice while picking their favor timepieces.