That would very likely be a futile attempt. I don't think any Hermes manager would allow that, unless the bag is in the showcase. And even then, you may be denied the opportunity to hold and touch one, if you don't have a relationship with the store.
touching and holding probably not, hence my advice to "look" very closely... looking is not a problem at most H boutiques even if they state that their exotics allocation is all taken; croc is a high value item that customers may reasonably expect to be shown an example of before ordering their first one... useful way for a serious intended customer to build a relationship actually