Dating a silverface fender
The output transformer code (center) shows that it was made in the 4th week of 1968, and the choke (right) was made in the 45th week of 1967 (look at the last three digits separated by a hyphen).
So, the transformers were made between November of ’67 and late January of ’68, so depending on how long they sat around in storage after their manufacture, the amp could have been assembled any time between January of 19.
The silver control panel (hence, “Silverface”) denotes that it was built after May of 1967 when they transitioned from the “Blackface” cosmetics. Another indicator of the date of manufacture is what Fender aficionados call the “drip-edge”; a thin aluminum trim that surrounds the silver and blue grille cloth on the front of the amp.
This was a cosmetic feature that was used only on Silverfaces during 1968.
On the left is the power transformer, with a code ending in “6802″.
After reading through Scooter’s build log, sending him a few messages, and finally speaking to him on the phone, I decided to pull the trigger on Mojotone‘s Blackface Bassman kit by his recommendation.Summary The Pro Reverb is one of the beloved 40W 6L6 working horses.It has the same 2×12″ speaker configuration as the Twin Reverb but has a less powerful amp.These are rough guidelines to help date your amplifier.Remember that a potentiometer could have been replaced so it is always best to look at a few of them.