#m=image%2Fjpeg&dim=1920x1440&alt=A+sparkly%2C+teal+USB+device+with+a+white+push+button+on+top.+No+screws+or+bolts+are+visably+holding+it+together.&blurhash=%23QKUNH4.%7EW-pWqozoJofWVWYjFs%3AkCaxoej%5BR*a%7D%7EX%25MD%25NGaeNGWBazj%5Bads%3AWVWBs%3ARkj%3FofayWANGNGoJoft7t7aeWVogoKWBWVoLs%3Aj%40j%40j%5BM%7Bs%3At7WBj%5Bs%3ARjWVWC&x=2afac7bfd468124fc3b91931d2092ff786997d3f879fb350cd8611d846ca364eThis it to distinguish it from the signet-1.3-n, pictured below.
#m=image%2Fjpeg&dim=1920x1440&alt=A+blue+USB+device+with+a+matching+blue+button.+This+one+has+bolts+visible+in+the+corners+of+the+case+and+a+loop+has+been+attached+to+hold+it+to+a+keychain.&blurhash=%23fMZ1yax%5EbR.a%23WDR-ocjssmaeR%2BWEWXoJs%2Ca%7DWX%7E2Rn9%24t2Rko0ayWXoej%3Dj%5Dj%5Daxocj%5BWEazaeR.jsNHbIt5WEs.oJa%23NKayoej%40oJR-R%2Bj%3Fs.R-j%5Bs%2CWCayoeWXazWC&x=a06f24a4b48bb708de90f89feb01bef4da51deb655935e6a846573660fb9393d
#m=image%2Fjpeg&dim=1920x1440&alt=The+bottom+of+that+same+USB+device.+From+this+angle%2C+we+can+see+the+nuts+that+are+flush+mounted+with+the+bottom.&blurhash=%23bLD3aE9%3D%3B-iofs%2BjEa%7Dofs9WEWroIWBR.ofs%2Cax%7E1xBIuR.R-R-R-WDWCt3obWBflt6jZR*bHkCjYofR.NHWBt5oeoIoJWFR%2BjsbIa%7Es%2BWBR-oKWrbHWCj%3Fs-WCoea%23WD&x=0fe7d9575e0b2bccc48aae6107c5e9666dd13b87fb7be418492535a2161ee43a
This is the older model case which had bolts that were visible from the top and required four M2.5 nuts to hold it together.
I thought the nuts would be needed to avoid the screws from stripping out in the plastic case, but it turns out even the test signet-1.3 devices that I've taken apart and put together numerous times have held up just fine.
#m=image%2Fjpeg&dim=1920x1280&alt=A+USB+device+without+a+case.+The+purple+printed+circuit+board+says+Signet+v1.3.+There+is+a+small+push+button+in+the+center+of+the+board.&blurhash=rTJt%3B%23RQ%7EVozIVoJj%3FWBs%3B%25MxaRjIoofxaWBWVof%252jtM%7Cj%5Bt6ayWVj%5BWCf8WBfiofoLWVWBayj%40t6j%40WCaxWBayofofaxf5WBj%5Ds%3AayWCoLayWC&x=99f4018d751c1c0fe9f1f5d227480e44688fd82ba57274b7b9b1cb6cd336dbac