93, the takedown is a Ward's Western Field. Made by J. Stevens model 520. The bolt is a Mossberg model 190 D. I have one 16 from each of the two series that Mossberg made between the late 30's and the 60's. The earlier model came with three individual chokes you just threaded on. The newer model came with the Select-A-Choke that could be turned from full to cylinder choke. The bolts do well with buck shot and slugs. Here's some more of the bolts, all are from the two series 16's 20's and 410's. Only twelve is on the far left. Only 2 left to complete the two series group.