Problem solved! Pocket watch brigade to the rescue!
Bear in mind that modern railroad watches such as you 992B have cases with a short (or non-existent) neck, or pendant on the case. There is no room for the typical sleeve inside the pendant, thereby, the crown can’t be pulled out! Earlier models with a typical pendant on the case are different. On such older cases, there
is room for a sleeve in the pendant. The case may contain a lever set movement, but the stem
can be pulled outward. Such cases are adaptable for both lever set and stem set movements. So as you embark on the collection of railroad watches, bear this in mind.
I have shown two railroad watches. One is a Hamilton 950 from the 1920s. The other is a 950B for the 1950s. Both railroad watches, both lever set. The one on the left is the older 950 model. Note the case on the 950 has a pendant, and an internal sleeve. The movement is lever set, and the stem
can be pulled outward. The one on the right is the 950B. Note, no pendant, no sleeve, and the crown
can’t be pulled out, even though the movement is lever set. Of course, the case on the 950B is also bar-over-crown, which is a dead giveaway that the stem can’t be pulled out!