I got this from the Gibson site the Y makes it a 1953 I am not sure what model it is, if it was my guitar I would be calling Gibson (Great Company) and I am sure they would be happy to help you Identify the model. I hope this helps.
Code Letter and Year
From 1952-1961, the F O N scheme followed the pattern of a letter, the batch number and an instrument
ranking number (when the guitar was built in the run of 40). The F O N is the only identification number
on Gibson's lower grade models (like the ES-125, ES-140, J-160E, etc.) which do not feature a paper label.
Higher grade models (such as the Super 400, L-5, J-200, etc.) feature both a serial number and a F O N.
When both numbers are present on a higher grade model, remember that the F O N was assigned at the
beginning of the production run, while the serial number was recorded later (before shipping). The serial
number would properly indicate the actual date of the guitar.
For the most accurate identification you would need to
contact the Gibson Guitar Corporation itself.