JRH

Got me to doing some research! Nov. 18, 1961 the W5 was changed to W6 with the 5 mH choke changing to 2.5 mH. In early 1964 all designations were changed to reflect TYPE_____ (fill in the blank). "1" was for Khorn & LaScala. "2" for Cornwall, Shorthorn 12", and Model H as a center "3" for Shorthorn 15" "4" for Model H "5" adopted later in 1964 for Khorn and LaScala Then on Oct. 9, 1964, EV tweeters were found to be variable in output. 1R was for 3dB low tweeters, 1Q for 6dB, and 1S for 9 dB! On Oct. 1, 1965, they discontinued the use of the L2 choke, so a further suffix was added. 1RB and so on. Whew!

28X733 was shipped 2/23/82. The AL network was introduced in late 82, so these should have had a Type AA. That would have been accompanied by the K-55-V squawker.

1720 and 21 were 1962.

American Studios does not seem to be postable even at 283K. Probably need someone to answer this before I can add it.

I believe this pic has one of the trailers. Former VP of Sales, Don Peterson, is in the center. Another installation was with American Studios, also pictured in my next response.

I need to talk to this guy!! Strange that they would have used a Type A crossover in 1972, however, the serial numbers indicate 1970! Updating to current with the advent of the AK6 K-horn has become more challenging (and expensive). You may want to update "only part way". A lot to be considered. jim@klipschmuseum.org

Congratulations! You have the 74th Khorn. While the coil was wound in March of 49, #174 did not ship until 2/27/1950. There is little info (discovered so far) on these early crossovers. The coils were wound on a home-made winder that we have in our collection.

The shipping logbook for these serial numbers was lost many years ago. I agree that the wood is almost certainly walnut. It is likely that they were not stained, but even if they were, the exact same stain on another wood species (birch) would not look the same. Color matching one species with another will nearly always require custom blending, and even then, don't expect perfection.

Shipped 5/2/1977 to Canada.

There is no special notation in the logbook. If they have a clear finish, it is EXTREMELY likely that it was done after shipping. That would also suggest that the quarter round was added at that time. You'll note that the velcro placement avoided the logo. This suggests that they were added later. I don't want to call anyone a liar, but there is no evidence that they left the factory with grills. There have been a few decorators leave the factory with grills, but this one shows no sign of it.

Yes, 9P303 thru 9P306 all left the factory painted black on June 15, 1976. I agree that the grills are aftermarket.

I can't help you. Value is always a matter of supply and demand. In this case the supply is low (good), but the demand is near impossible to establish without some historical prices realized.

184 is very interesting, in that it was sold thru one of PWK's first dealers and a personal friend. I believe George Beggs was President of Leeds Northrup. 575 was not shipped until March 23, 1954, although the signature is the 5th.

The brochure code is August 1985 (for that particular printing of 20,000 copies). Guess I forgot about the green option! That too must be fairly rare.

Yes, a special order was undoubtedly the reason for this pair. As best as I can make out from the photo, this was the standard brown cloth of the day. Paper logbooks were not used in this timeframe, so exact rarity cannot be determined. I would say "damn rare" for a Heresy II.

FYI, cane grills were discontinued long ago. The material was discontinued, and the manufacturer does not have access to a "reasonable facsimile". The used/salvage market is all that I know of, i.e., eBay etc.

I believe so!

Both shipped to Canada 7/27/83.

Looks like Portus added a zero by mistake!

"C" indicates 1965. However, there are too many digits in 2C0670. 2C067 makes sense, and was paired with 2C068. We do not have the shipping logbook for 1965, so I cannot speak to original location, driver compliment, or final wood finish.

I agree with risingjay!

Sorry, October 19th!

FR is fir raw. Someone did a stellar job of veneering them. 1602 and 1603 were shipped to Bernard W. Przywara of Wheaton, MD on October 11, 1961.

Rarity is high, but performance is compromised. A collector might want to keep it as is, but it is also possible to update it to near-current performance, albeit at a fairly steep cost.

This is a Klipschorn Junior, likely mid- to early 50's. The Cobraflex was used as a cost reduction in anticipation that the buyer would eventually upgrade. The coil formers (wooden discs) are likely to have dates penciled in.